RHSA-2026:17080
Vulnerability from csaf_redhat - Published: 2026-05-13 14:50 - Updated: 2026-05-20 16:13Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
httpd:
* httpd-2.4.67-1.hum1 (aarch64, x86_64)
* httpd-core-2.4.67-1.hum1 (aarch64, x86_64)
* httpd-devel-2.4.67-1.hum1 (aarch64, x86_64)
* httpd-filesystem-2.4.67-1.hum1 (noarch)
* httpd-manual-2.4.67-1.hum1 (noarch)
* httpd-tools-2.4.67-1.hum1 (aarch64, x86_64)
* mod_ldap-2.4.67-1.hum1 (aarch64, x86_64)
* mod_lua-2.4.67-1.hum1 (aarch64, x86_64)
* mod_proxy_html-2.4.67-1.hum1 (aarch64, x86_64)
* mod_session-2.4.67-1.hum1 (aarch64, x86_64)
* mod_ssl-2.4.67-1.hum1 (aarch64, x86_64)
* httpd-2.4.67-1.hum1.src (src)
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_dav_lock module of httpd. This vulnerability allows a remote unauthenticated attacker to crash the server due to a NULL pointer dereference via a specially crafted request.
7.5 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:httpd-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Low
A flaw was found in the mod_auth_digest module of httpd. A remote unauthenticated attacker can bypass digest authentication by measuring timing discrepancies of requests. This issue leads to unauthorized access to resources protected by digest authentication.
4.8 (Medium)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:httpd-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in httpd. When processing responses from an untrusted or compromised backend server, multiple modules fail to sanitize Carriage Return and Line Feed (CRLF) sequences in the HTTP status line. This issue leads to an HTTP response splitting attack.
6.5 (Medium)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:httpd-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
References
20 references
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"cwe": {
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"name": "Observable Timing Discrepancy"
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"ids": [
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"notes": [
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"title": "Vulnerability summary"
},
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"baseScore": 4.8,
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "httpd: mod_auth_digest: timing attack allows a bypass of digest authentication"
},
{
"cve": "CVE-2026-33523",
"cwe": {
"id": "CWE-443",
"name": "CWE-443"
},
"discovery_date": "2026-05-04T15:01:21.624499+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
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{
"category": "description",
"text": "A flaw was found in httpd. When processing responses from an untrusted or compromised backend server, multiple modules fail to sanitize Carriage Return and Line Feed (CRLF) sequences in the HTTP status line. This issue leads to an HTTP response splitting attack.",
"title": "Vulnerability description"
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"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.",
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"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33523",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33523"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2026-05-04T14:40:41.430000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-13T14:50:31+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:httpd-main@aarch64",
"Red Hat Hardened Images:httpd-main@noarch",
"Red Hat Hardened Images:httpd-main@src",
"Red Hat Hardened Images:httpd-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:17080"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
"product_ids": [
"Red Hat Hardened Images:httpd-main@aarch64",
"Red Hat Hardened Images:httpd-main@noarch",
"Red Hat Hardened Images:httpd-main@src",
"Red Hat Hardened Images:httpd-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:httpd-main@aarch64",
"Red Hat Hardened Images:httpd-main@noarch",
"Red Hat Hardened Images:httpd-main@src",
"Red Hat Hardened Images:httpd-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "httpd: HTTP response splitting forwarding malicious status line"
}
]
}
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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.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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