Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote… (CVE-2026-63292)
A stack-based buffer overflow vulnerability exists in the mod_vhost_alias module of Apache HTTP Server versions through 2.4.68 on all platforms. This flaw can be triggered by a remote client sending an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is configured above its default. The vulnerability may lead to denial of service or potentially allow arbitrary code execution. Upgrading to Apache HTTP Server version 2.4.69 addresses this issue.
AI Analysis
Technical Summary
The Apache HTTP Server mod_vhost_alias module contains a stack-based buffer overflow vulnerability in versions up to 2.4.68. The issue arises when a remote client sends an HTTP request with a Host header larger than 8192 bytes, combined with the use of VirtualDocumentRoot with a hostname format specifier and an increased LimitRequestFieldSize setting. This can cause memory corruption leading to denial of service or arbitrary code execution. The vulnerability is fixed in version 2.4.69.
Potential Impact
Remote attackers can exploit this vulnerability by sending specially crafted HTTP requests with oversized Host headers, potentially causing the server to crash (denial of service) or execute arbitrary code. This could compromise the availability and security of affected servers.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.69, which contains the official fix for this vulnerability. No other mitigations are indicated or recommended by the vendor advisory.
Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote… (CVE-2026-63292)
Description
A stack-based buffer overflow vulnerability exists in the mod_vhost_alias module of Apache HTTP Server versions through 2.4.68 on all platforms. This flaw can be triggered by a remote client sending an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is configured above its default. The vulnerability may lead to denial of service or potentially allow arbitrary code execution. Upgrading to Apache HTTP Server version 2.4.69 addresses this issue.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Apache HTTP Server mod_vhost_alias module contains a stack-based buffer overflow vulnerability in versions up to 2.4.68. The issue arises when a remote client sends an HTTP request with a Host header larger than 8192 bytes, combined with the use of VirtualDocumentRoot with a hostname format specifier and an increased LimitRequestFieldSize setting. This can cause memory corruption leading to denial of service or arbitrary code execution. The vulnerability is fixed in version 2.4.69.
Potential Impact
Remote attackers can exploit this vulnerability by sending specially crafted HTTP requests with oversized Host headers, potentially causing the server to crash (denial of service) or execute arbitrary code. This could compromise the availability and security of affected servers.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.69, which contains the official fix for this vulnerability. No other mitigations are indicated or recommended by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f6c9-29xf-9j37
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63292"]
- State
- PUBLISHED
Threat ID: 6abeb3e3a43b0b3b89ed01e1
Added to database: 10/01/2026, 19:26:27 UTC
Last enriched: 10/01/2026, 19:28:58 UTC
Last updated: 10/02/2026, 02:45:56 UTC
Views: 2
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