A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted… (CVE-2026-63686)
A NULL pointer dereference vulnerability exists in the mod_xml2enc module of Apache HTTP Server versions before 2.4.69. This flaw allows an untrusted backend server to cause a denial of service (DoS) by sending a proxied response with a charset whose conversion partially succeeds and then fails. The issue affects all platforms running vulnerable versions. Upgrading to Apache HTTP Server version 2.4.69 or later resolves this vulnerability.
AI Analysis
Technical Summary
The vulnerability (CVE-2026-63686) is a NULL pointer dereference in the mod_xml2enc module of Apache HTTP Server prior to version 2.4.69. An untrusted backend server can exploit this by sending a proxied response containing a charset conversion that partially succeeds and then fails, triggering a denial of service condition. This affects all platforms running affected versions. The vendor recommends upgrading to version 2.4.69, which includes the fix.
Potential Impact
An untrusted backend server can cause the Apache HTTP Server to crash or become unavailable due to a NULL pointer dereference in mod_xml2enc. This results in a denial of service condition, impacting server availability.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.69 or later, where this issue is fixed. No other mitigation or temporary workaround is indicated.
A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted… (CVE-2026-63686)
Description
A NULL pointer dereference vulnerability exists in the mod_xml2enc module of Apache HTTP Server versions before 2.4.69. This flaw allows an untrusted backend server to cause a denial of service (DoS) by sending a proxied response with a charset whose conversion partially succeeds and then fails. The issue affects all platforms running vulnerable versions. Upgrading to Apache HTTP Server version 2.4.69 or later resolves this vulnerability.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability (CVE-2026-63686) is a NULL pointer dereference in the mod_xml2enc module of Apache HTTP Server prior to version 2.4.69. An untrusted backend server can exploit this by sending a proxied response containing a charset conversion that partially succeeds and then fails, triggering a denial of service condition. This affects all platforms running affected versions. The vendor recommends upgrading to version 2.4.69, which includes the fix.
Potential Impact
An untrusted backend server can cause the Apache HTTP Server to crash or become unavailable due to a NULL pointer dereference in mod_xml2enc. This results in a denial of service condition, impacting server availability.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.69 or later, where this issue is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-h4g4-79cj-82qx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63686"]
- State
- PUBLISHED
Threat ID: 6abeb3e3a43b0b3b89ecebc3
Added to database: 10/01/2026, 19:26:27 UTC
Last enriched: 10/01/2026, 19:28:07 UTC
Last updated: 10/02/2026, 02:45:56 UTC
Views: 4
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