Product
HTTP Server
Description
The Apache HTTP Server Project is an effort to develop and maintain an open-source HTTP server for modern operating systems including UNIX and Windows.
Product name
http_server
Related organizations
CVE-2026-24072 (GCVE-0-2026-24072)
Vulnerability from – Published: 2026-05-04 12:37 – Updated: 2026-05-05 03:56
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_rewrite elevation of privileges via ap_expr
Summary
An escalation of privilege bug in various modules in Apache HTTP 2.4.66 and earlier allows local .htaccess authors to read files with the privileges of the httpd user.
Users are recommended to upgrade to version 2.4.67, which fixes this issue.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
0 , ≤ 2.4.66
(semver)
|
Credits
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CVE-2026-33006 (GCVE-0-2026-33006)
Vulnerability from – Published: 2026-05-04 14:42 – Updated: 2026-05-04 18:23
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_auth_digest timing attack
Summary
A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker.
Users are recommended to upgrade to version 2.4.67, which fixes this issue.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
0 , ≤ 2.4.66
(semver)
|
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CVE-2026-34059 (GCVE-0-2026-34059)
Vulnerability from – Published: 2026-05-04 12:39 – Updated: 2026-05-04 17:32
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in ajp_parse_data()
Summary
Buffer Over-read vulnerability in Apache HTTP Server.
This issue affects Apache HTTP Server: through 2.4.66.
Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-126 - Buffer Over-read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
0 , ≤ 2.4.66
(semver)
|
Credits
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CVE-2026-34032 (GCVE-0-2026-34032)
Vulnerability from – Published: 2026-05-04 12:54 – Updated: 2026-05-04 17:32
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check (ajp_msg_get_string)
Summary
Improper Null Termination, Out-of-bounds Read vulnerability in Apache HTTP Server.
This issue affects Apache HTTP Server: through 2.4.66.
Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
0 , ≤ 2.4.66
(semver)
|
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CVE-2026-33857 (GCVE-0-2026-33857)
Vulnerability from – Published: 2026-05-04 13:07 – Updated: 2026-05-04 17:32
VLAI
EPSS
VEX
Title
Apache HTTP Server: Off-by-one OOB reads in AJP getter functions
Summary
Out-of-bounds Read vulnerability in mod_proxy_ajp of
Apache HTTP Server.
This issue affects Apache HTTP Server: through 2.4.66.
Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
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Affected:
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CVE-2026-33523 (GCVE-0-2026-33523)
Vulnerability from – Published: 2026-05-04 14:40 – Updated: 2026-05-04 17:32
VLAI
EPSS
VEX
Title
Apache HTTP Server: multiple modules: HTTP response splitting forwarding malicious status line
Summary
HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers.
This issue affects Apache HTTP Server: from through 2.4.66.
Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-443 - HTTP response splitting
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
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| Apache Software Foundation | Apache HTTP Server |
Affected:
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(semver)
|
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CVE-2025-23048 (GCVE-0-2025-23048)
Vulnerability from – Published: 2025-07-10 16:56 – Updated: 2026-02-26 17:50
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_ssl access control bypass with session resumption
Summary
In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.63, an access control bypass by trusted clients is possible using TLS 1.3 session resumption.
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Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-284 - Improper Access Control
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
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(semver)
|
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CVE-2025-58098 (GCVE-0-2025-58098)
Vulnerability from – Published: 2025-12-05 13:40 – Updated: 2026-02-26 16:57
VLAI
EPSS
VEX
Title
Apache HTTP Server: Server Side Includes adds query string to #exec cmd=...
Summary
Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives.
This issue affects Apache HTTP Server before 2.4.66.
Users are recommended to upgrade to version 2.4.66, which fixes the issue.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-201 - Insertion of Sensitive Information Into Sent Data
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
0 , < 2.4.66
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|
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CVE-2023-25690 (GCVE-0-2023-25690)
Vulnerability from – Published: 2023-03-07 15:09 – Updated: 2025-12-18 15:37
VLAI
EPSS
VEX
Title
Apache HTTP Server: HTTP request splitting with mod_rewrite and mod_proxy
Summary
Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack.
Configurations are affected when mod_proxy is enabled along with some form of RewriteRule
or ProxyPassMatch in which a non-specific pattern matches
some portion of the user-supplied request-target (URL) data and is then
re-inserted into the proxied request-target using variable
substitution. For example, something like:
RewriteEngine on
RewriteRule "^/here/(.*)" "http://example.com:8080/elsewhere?$1"; [P]
ProxyPassReverse /here/ http://example.com:8080/
Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Users are recommended to update to at least version 2.4.56 of Apache HTTP Server.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.55
(semver)
|
Credits
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CVE-2022-28615 (GCVE-0-2022-28615)
Vulnerability from – Published: 2022-06-08 10:00 – Updated: 2025-12-18 15:26
VLAI
EPSS
VEX
Title
Read beyond bounds in ap_strcmp_match()
Summary
Apache HTTP Server 2.4.53 and earlier may crash or disclose information due to a read beyond bounds in ap_strcmp_match() when provided with an extremely large input buffer. While no code distributed with the server can be coerced into such a call, third-party modules or lua scripts that use ap_strcmp_match() may hypothetically be affected.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2022/06/08/9 | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2022062… | x_refsource_CONFIRM |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://security.gentoo.org/glsa/202208-20 | vendor-advisoryx_refsource_GENTOO |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
Apache HTTP Server , ≤ 2.4.53
(custom)
|
Credits
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