CVE-2026-63292: CWE-121 Stack-based Buffer Overflow in Apache Software Foundation Apache HTTP Server
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 client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
AI Analysis
Technical Summary
CVE-2026-63292 is a stack-based buffer overflow in the mod_vhost_alias module of Apache HTTP Server versions 2.4.0 through 2.4.68. The flaw is triggered by sending an HTTP request with a Host header longer than 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is increased beyond the default. This can cause a denial of service or potentially allow remote code execution. The Apache Software Foundation has addressed this vulnerability in version 2.4.69.
Potential Impact
Exploitation of this vulnerability allows a remote attacker to cause a denial of service or potentially execute arbitrary code on the affected server. This could disrupt service availability or compromise the server's integrity. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.69 or later, which contains the official fix for this vulnerability. Until upgraded, it is recommended to avoid increasing LimitRequestFieldSize above the default and to monitor Host header sizes in requests if possible.
CVE-2026-63292: CWE-121 Stack-based Buffer Overflow in Apache Software Foundation Apache HTTP Server
Description
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 client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
CVSS v3.1
Score 7.5high
Affected software
Apache Software Foundation
Apache HTTP Server
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-63292 is a stack-based buffer overflow in the mod_vhost_alias module of Apache HTTP Server versions 2.4.0 through 2.4.68. The flaw is triggered by sending an HTTP request with a Host header longer than 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is increased beyond the default. This can cause a denial of service or potentially allow remote code execution. The Apache Software Foundation has addressed this vulnerability in version 2.4.69.
Potential Impact
Exploitation of this vulnerability allows a remote attacker to cause a denial of service or potentially execute arbitrary code on the affected server. This could disrupt service availability or compromise the server's integrity. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.69 or later, which contains the official fix for this vulnerability. Until upgraded, it is recommended to avoid increasing LimitRequestFieldSize above the default and to monitor Host header sizes in requests if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-07-16T09:06:13.760Z
- State
- PUBLISHED
Threat ID: 6abe8b02a43b0b3b89c7c753
Added to database: 10/01/2026, 16:32:02 UTC
Last enriched: 10/01/2026, 16:47:39 UTC
Last updated: 10/02/2026, 04:45:56 UTC
Views: 12
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.