RHSA-2026:88229
Vulnerability from csaf_opensuse - Published: 2026-10-22 14:25 - Updated: 2026-10-26 13:46Summary
Red Hat Security Advisory: httpd security update
Severity
Important
Notes
Topic: An update for httpd is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
Security Fix(es):
* httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi (CVE-2026-63718)
* httpd: httpd: Denial of Service via integer overflow in mod_dav_fs (CVE-2026-93546)
* httpd: httpd: Authentication state corruption via concurrent Digest authentication requests (CVE-2026-73637)
* httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response (CVE-2026-63045)
* httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias (CVE-2026-63292)
* httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference (CVE-2026-46729)
* httpd: httpd: Authentication bypass via credential replay in mod_auth_digest (CVE-2026-73636)
* httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc (CVE-2026-63686)
* httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest (CVE-2026-48005)
* httpd: httpd: Denial of Service via mod_rewrite lookahead (CVE-2026-56154)
* httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite (CVE-2026-56153)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in the mod_heartmonitor module of the Apache HTTP Server. A remote, unauthenticated attacker can exploit a NULL pointer dereference vulnerability when the module is configured with a unicast listener. By sending specially crafted network traffic to the listening service, an attacker can crash the server process, resulting in a Denial of Service (DoS).
7.5 (High)
Affected products
Fixed
75 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-0:2.4.62-13.el9_8.9.src | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-debuginfo-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-debuginfo-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-debuginfo-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-core-debuginfo-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debuginfo-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debuginfo-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debuginfo-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debuginfo-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debugsource-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debugsource-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debugsource-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-debugsource-0:2.4.62-13.el9_8.9.x86_64 | — |
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fix
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-devel-0:2.4.62-13.el9_8.9.aarch64 | — |
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fix
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-devel-0:2.4.62-13.el9_8.9.ppc64le | — |
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-devel-0:2.4.62-13.el9_8.9.s390x | — |
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fix
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-devel-0:2.4.62-13.el9_8.9.x86_64 | — |
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fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-filesystem-0:2.4.62-13.el9_8.9.noarch | — |
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fix
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-manual-0:2.4.62-13.el9_8.9.noarch | — |
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fix
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-0:2.4.62-13.el9_8.9.aarch64 | — |
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fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-0:2.4.62-13.el9_8.9.s390x | — |
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fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-debuginfo-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-debuginfo-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-debuginfo-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:httpd-tools-debuginfo-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-0:2.4.62-13.el9_8.9.s390x | — |
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fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-debuginfo-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-debuginfo-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-debuginfo-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ldap-debuginfo-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-debuginfo-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-debuginfo-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-debuginfo-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_lua-debuginfo-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-1:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-1:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-1:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-1:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-debuginfo-1:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-debuginfo-1:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-debuginfo-1:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_proxy_html-debuginfo-1:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-debuginfo-0:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-debuginfo-0:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-debuginfo-0:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_session-debuginfo-0:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-1:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-1:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-1:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-1:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-debuginfo-1:2.4.62-13.el9_8.9.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-debuginfo-1:2.4.62-13.el9_8.9.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-debuginfo-1:2.4.62-13.el9_8.9.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:mod_ssl-debuginfo-1:2.4.62-13.el9_8.9.x86_64 | — |
Vendor Fix
fix
Workaround
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Threats
Impact
Important
A flaw was found in the mod_auth_digest module of the Apache HTTP Server. When Digest authentication is configured with nonce-count checking enabled, missing authentication checks allow an unauthenticated remote attacker to submit forged HTTP Authorization headers. This flaw can lead to a Denial of Service (DoS) condition by disrupting valid sessions and repeatedly forcing legitimate users to re-authenticate.
CWE-303 - Incorrect Implementation of Authentication AlgorithmAffected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Low
A flaw was found in httpd's mod_charset_lite module. A heap-based buffer overflow (an out-of-bounds memory write) occurs in the finish_partial_char function when handling character set conversions. A remote attacker can exploit this flaw by sending specially crafted requests, leading to memory corruption. This issue primarily results in a Denial of Service (DoS) condition by crashing the server process.
7.5 (High)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Important
A use-after-free flaw was found in the mod_rewrite module of Apache HTTP Server when evaluating URL lookahead expressions that reference HTTP request headers, such as %{LA-U:HTTP:...}. A remote attacker may be able to trigger invalid memory access in a server using an affected rewrite configuration, potentially causing a denial of service or arbitrary code execution.
8.1 (High)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Important
A flaw was found in httpd. When configured as a forward proxy using the mod_proxy_ftp module, the server improperly validates the network address returned in a File Transfer Protocol (FTP) passive mode (PASV) response. A malicious FTP server can exploit this flaw by returning a crafted reply, forcing the proxy to establish a data connection to an arbitrary third-party host. This issue may allow an attacker to initiate unauthorized network connections or probe internal systems that are otherwise inaccessible.
5.3 (Medium)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Moderate
A flaw was found in httpd's mod_vhost_alias module. A remote attacker can exploit a stack-based buffer overflow by sending a crafted HTTP request with an excessively large Host header to a server using specific virtual hosting configurations. This issue can lead to arbitrary code execution or cause a Denial of Service (DoS) by crashing the web server.
8.1 (High)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Important
A flaw was found in the mod_xml2enc module of the Apache HTTP Server. An untrusted backend server can cause a Denial of Service (DoS) by returning a crafted response with a character set whose conversion partially succeeds and then fails. Processing this response triggers an invalid memory access (null pointer dereference), causing the server process to crash.
7.5 (High)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Important
A flaw was found in the mod_proxy_uwsgi module of Apache HTTP Server. This issue allows HTTP response smuggling when the server processes a crafted uWSGI response containing a Transfer-Encoding header. A remote attacker can exploit this vulnerability to desynchronize HTTP communications, potentially leading to response tampering or cache poisoning for other users.
7.5 (High)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Important
A flaw was found in the mod_auth_digest module of the Apache HTTP Server. This vulnerability allows an attacker positioned on the network to bypass authentication by replaying previously intercepted user credentials. When the server is configured with a nonce (a single-use security token) lifetime of zero, an attacker can send crafted requests that prematurely clear the client session entry from shared memory, enabling unauthorized access using the replayed credentials.
8.1 (High)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Important
A flaw was found in httpd's mod_auth_digest module. A use-after-free vulnerability allows an unauthenticated remote attacker to corrupt the server's authentication state by submitting concurrent Digest authentication requests. This issue occurs when specific configuration settings, such as nonce checking (AuthDigestNcCheck) or zero-duration nonce lifetimes (AuthDigestNonceLifetime), are enabled.
5.6 (Medium)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Moderate
A flaw was found in httpd. An integer overflow in the mod_dav_fs module occurs when processing Web Distributed Authoring and Versioning (WebDAV) PROPPATCH requests that declare an excessive number of XML namespaces. An authenticated remote attacker with write access can exploit this flaw to crash server worker processes, causing a Denial of Service (DoS), and persistently corrupt the directory's property database.
5.4 (Medium)
Affected products
Fixed
75 products, the same list as for
CVE-2026-46729
Threats
Impact
Moderate
References
70 references
{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for httpd is now available for Red Hat Enterprise Linux 9.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
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"text": "httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46729"
},
{
"category": "external",
"summary": "RHBZ#2544835",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544835"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46729",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46729"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46729",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46729"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/13",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/13"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-10-01T15:55:27.083000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"title": "httpd: httpd: mod_heartmonitor: Denial of Service via NULL pointer dereference"
},
{
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"cwe": {
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"name": "Incorrect Implementation of Authentication Algorithm"
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"ids": [
{
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"text": "2544861"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the mod_auth_digest module of the Apache HTTP Server. When Digest authentication is configured with nonce-count checking enabled, missing authentication checks allow an unauthenticated remote attacker to submit forged HTTP Authorization headers. This flaw can lead to a Denial of Service (DoS) condition by disrupting valid sessions and repeatedly forcing legitimate users to re-authenticate.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-48005"
},
{
"category": "external",
"summary": "RHBZ#2544861",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544861"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-48005",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-48005"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-48005",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48005"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/15",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/15"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-10-01T16:01:35.559000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 3.7,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
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"title": "httpd: httpd: Denial of service via forged Authorization headers in mod_auth_digest"
},
{
"cve": "CVE-2026-56153",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
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"ids": [
{
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"text": "2544885"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in httpd\u0027s mod_charset_lite module. A heap-based buffer overflow (an out-of-bounds memory write) occurs in the finish_partial_char function when handling character set conversions. A remote attacker can exploit this flaw by sending specially crafted requests, leading to memory corruption. This issue primarily results in a Denial of Service (DoS) condition by crashing the server process.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-56153"
},
{
"category": "external",
"summary": "RHBZ#2544885",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544885"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-56153",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-56153"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56153",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56153"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/16",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/16"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-10-01T16:03:25.568000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"integrityImpact": "NONE",
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"title": "httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite"
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{
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"cwe": {
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{
"category": "description",
"text": "A use-after-free flaw was found in the mod_rewrite module of Apache HTTP Server when evaluating URL lookahead expressions that reference HTTP request headers, such as %{LA-U:HTTP:...}. A remote attacker may be able to trigger invalid memory access in a server using an affected rewrite configuration, potentially causing a denial of service or arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Denial of Service via mod_rewrite lookahead",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat initially assesses this issue as Important due to the potential for remote denial of service or code execution in affected mod_rewrite configurations. Exploitation requires URL lookahead expressions that reference HTTP request headers, such as %{LA-U:HTTP:...}. Product-specific impact and exploitation conditions remain under review with Engineering.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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},
{
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"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56154",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56154"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/17",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/17"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-10-01T16:03:52.280000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "httpd: httpd: Denial of Service via mod_rewrite lookahead"
},
{
"cve": "CVE-2026-63045",
"cwe": {
"id": "CWE-918",
"name": "Server-Side Request Forgery (SSRF)"
},
"discovery_date": "2026-10-01T23:05:56.978362+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544823"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in httpd. When configured as a forward proxy using the mod_proxy_ftp module, the server improperly validates the network address returned in a File Transfer Protocol (FTP) passive mode (PASV) response. A malicious FTP server can exploit this flaw by returning a crafted reply, forcing the proxy to establish a data connection to an arbitrary third-party host. This issue may allow an attacker to initiate unauthorized network connections or probe internal systems that are otherwise inaccessible.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-63045"
},
{
"category": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544823"
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{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-63045"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63045",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63045"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/23",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/23"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-10-01T16:09:07.643000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:88229"
},
{
"category": "workaround",
"details": "Disable the mod_proxy_ftp module or ensure forward proxying is disabled in the Apache HTTP Server configuration.\n\n1. Comment out the mod_proxy_ftp module load line in `/etc/httpd/conf.modules.d/00-proxy.conf`:\n```\n# LoadModule proxy_ftp_module modules/mod_proxy_ftp.so\n```\n\n2. Ensure forward proxying is turned off in `/etc/httpd/conf/httpd.conf`:\n```\nProxyRequests Off\n```\n\n3. Reload the httpd service to apply changes:\n```\nsystemctl reload httpd\n```\n\nCaveat: Disabling mod_proxy_ftp terminates the ability of httpd to proxy FTP requests.\nWarning: Reloading or restarting the httpd service will briefly affect active connections while configuration changes are reloaded.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "httpd: httpd: unauthorized connection to arbitrary hosts via crafted FTP PASV response"
},
{
"cve": "CVE-2026-63292",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2026-10-01T23:06:53.740525+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544832"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in httpd\u0027s mod_vhost_alias module. A remote attacker can exploit a stack-based buffer overflow by sending a crafted HTTP request with an excessively large Host header to a server using specific virtual hosting configurations. This issue can lead to arbitrary code execution or cause a Denial of Service (DoS) by crashing the web server.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "external",
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63292",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63292"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/24",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/24"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
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"release_date": "2026-10-01T16:11:47.911000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"url": "https://access.redhat.com/errata/RHSA-2026:88229"
},
{
"category": "workaround",
"details": "To mitigate this vulnerability without code modifications, ensure that `LimitRequestFieldSize` remains at or below its default limit of 8190 bytes, or disable the `mod_vhost_alias` module if dynamic virtual hosting is not required.\n\n1. Ensure `LimitRequestFieldSize` is not configured above 8190 in `/etc/httpd/conf/httpd.conf` or `/etc/httpd/conf.d/`:\n```\nLimitRequestFieldSize 8190\n```\n\n2. Alternatively, if `mod_vhost_alias` is not needed, disable it by commenting out its loading directive in `/etc/httpd/conf.modules.d/00-base.conf`:\n```\n# LoadModule vhost_alias_module modules/mod_vhost_alias.so\n```\n\n3. Validate the configuration syntax and reload the service:\n```\napachectl configtest\nsystemctl reload httpd\n```\n\nCaveats: Restricting `LimitRequestFieldSize` may reject legitimate requests that carry exceptionally large HTTP headers, returning a 400 Bad Request response. Disabling `mod_vhost_alias` prevents the use of dynamic virtual host directives such as `VirtualDocumentRoot`.\n\nWarning: Reloading or restarting the `httpd` daemon may briefly affect in-flight network connections.",
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{
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"category": "impact",
"details": "Important"
}
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"title": "httpd: httpd: Arbitrary code execution via oversized Host header in mod_vhost_alias"
},
{
"cve": "CVE-2026-63686",
"cwe": {
"id": "CWE-476",
"name": "NULL Pointer Dereference"
},
"discovery_date": "2026-10-01T23:09:03.782806+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544852"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the mod_xml2enc module of the Apache HTTP Server. An untrusted backend server can cause a Denial of Service (DoS) by returning a crafted response with a character set whose conversion partially succeeds and then fails. Processing this response triggers an invalid memory access (null pointer dereference), causing the server process to crash.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "external",
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{
"category": "external",
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{
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{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"category": "none"
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"url": "https://access.redhat.com/errata/RHSA-2026:88229"
},
{
"category": "workaround",
"details": "If proxy character set transcoding is not required, disable the mod_xml2enc module by commenting out its configuration directive.\n\n1. Edit the module configuration file (typically located under `/etc/httpd/conf.modules.d/`) and comment out the loading directive:\n # LoadModule xml2enc_module modules/mod_xml2enc.so\n\n2. Verify the configuration syntax:\n httpd -t\n\n3. Reload the Apache HTTP Server to apply changes:\n systemctl reload httpd\n\nCaveats: Disabling mod_xml2enc will break modules that depend on XML or HTML character set conversion, such as mod_proxy_html. If this module is required, restrict proxy rules so httpd communicates only with trusted upstream backends.\n\nWarning: Reloading or restarting the httpd service may cause a brief interruption to active connections.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"title": "httpd: httpd: Denial of Service via charset conversion failure in mod_xml2enc"
},
{
"cve": "CVE-2026-63718",
"cwe": {
"id": "CWE-444",
"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
"discovery_date": "2026-10-01T22:29:59.448690+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544781"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the mod_proxy_uwsgi module of Apache HTTP Server. This issue allows HTTP response smuggling when the server processes a crafted uWSGI response containing a Transfer-Encoding header. A remote attacker can exploit this vulnerability to desynchronize HTTP communications, potentially leading to response tampering or cache poisoning for other users.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"category": "external",
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{
"category": "external",
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"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
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"category": "none"
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"url": "https://access.redhat.com/errata/RHSA-2026:88229"
},
{
"category": "workaround",
"details": "If uWSGI proxy functionality is not required, disable the mod_proxy_uwsgi module:\n\n1. Edit the Apache proxy module configuration file (typically `/etc/httpd/conf.modules.d/00-proxy.conf`) and comment out the loading directive:\n # LoadModule proxy_uwsgi_module modules/mod_proxy_uwsgi.so\n\n2. Restart the Apache HTTP Server daemon:\n systemctl restart httpd\n\nWarning: Restarting the httpd service causes an immediate disruption to active client connections. Disabling this module will prevent the server from handling requests routed through the uWSGI protocol.",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "httpd: httpd: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi"
},
{
"cve": "CVE-2026-73636",
"cwe": {
"id": "CWE-294",
"name": "Authentication Bypass by Capture-replay"
},
"discovery_date": "2026-10-01T23:08:47.276061+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544849"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the mod_auth_digest module of the Apache HTTP Server. This vulnerability allows an attacker positioned on the network to bypass authentication by replaying previously intercepted user credentials. When the server is configured with a nonce (a single-use security token) lifetime of zero, an attacker can send crafted requests that prematurely clear the client session entry from shared memory, enabling unauthorized access using the replayed credentials.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Authentication bypass via credential replay in mod_auth_digest",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
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"details": "Ensure that `AuthDigestNonceLifetime` is not set to `0`. If digest authentication is not required, disable `mod_auth_digest`.\n\n1. To retain digest authentication with safe settings, set a positive non-zero value (such as the default 300 seconds) or remove the explicit zero setting from `/etc/httpd/conf/httpd.conf` or relevant files in `/etc/httpd/conf.d/`:\n```\nAuthDigestNonceLifetime 300\n```\n\n2. If HTTP digest authentication is not needed, disable the module by commenting out the corresponding line in `/etc/httpd/conf.modules.d/00-base.conf`:\n```\n#LoadModule auth_digest_module modules/mod_auth_digest.so\n```\n\n3. Restart the web server to apply changes:\n```\nsystemctl restart httpd\n```\n\nWarning: Restarting or reloading the httpd service will briefly disrupt active client connections. Disabling the module will break authentication for virtual hosts or directories relying on digest authentication.",
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"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "httpd: httpd: Authentication bypass via credential replay in mod_auth_digest"
},
{
"cve": "CVE-2026-73637",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-10-01T23:01:30.310347+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544814"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in httpd\u0027s mod_auth_digest module. A use-after-free vulnerability allows an unauthenticated remote attacker to corrupt the server\u0027s authentication state by submitting concurrent Digest authentication requests. This issue occurs when specific configuration settings, such as nonce checking (AuthDigestNcCheck) or zero-duration nonce lifetimes (AuthDigestNonceLifetime), are enabled.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Authentication state corruption via concurrent Digest authentication requests",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-73637"
},
{
"category": "external",
"summary": "RHBZ#2544814",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544814"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-73637",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-73637"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-73637",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73637"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/28",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/28"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-10-01T16:18:30.190000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
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"details": "Moderate"
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"title": "httpd: httpd: Authentication state corruption via concurrent Digest authentication requests"
},
{
"cve": "CVE-2026-93546",
"cwe": {
"id": "CWE-190",
"name": "Integer Overflow or Wraparound"
},
"discovery_date": "2026-10-01T22:44:48.492068+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544798"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in httpd. An integer overflow in the mod_dav_fs module occurs when processing Web Distributed Authoring and Versioning (WebDAV) PROPPATCH requests that declare an excessive number of XML namespaces. An authenticated remote attacker with write access can exploit this flaw to crash server worker processes, causing a Denial of Service (DoS), and persistently corrupt the directory\u0027s property database.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: httpd: Denial of Service via integer overflow in mod_dav_fs",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-93546"
},
{
"category": "external",
"summary": "RHBZ#2544798",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544798"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-93546",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-93546"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-93546",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93546"
},
{
"category": "external",
"summary": "http://www.openwall.com/lists/oss-security/2026/10/01/30",
"url": "http://www.openwall.com/lists/oss-security/2026/10/01/30"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-10-01T16:19:32.662000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-22T14:25:14+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "httpd: httpd: Denial of Service via integer overflow in mod_dav_fs"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.