CVE-2026-44631: CWE-124: Buffer Underwrite in Apache Software Foundation Apache HTTP Server
A critical buffer underwrite vulnerability (CWE-124) exists in Apache HTTP Server versions from 2.4.0 through 2.4.67. The flaw is triggered by crafted regular expressions in the server configuration. This vulnerability allows an attacker to potentially execute arbitrary code or cause denial of service. The issue is fixed in Apache HTTP Server version 2.4.68.
AI Analysis
Technical Summary
CVE-2026-44631 is a buffer underwrite vulnerability in Apache HTTP Server affecting versions 2.4.0 through 2.4.67. The vulnerability arises from improper handling of crafted regular expressions in the server configuration, which can lead to memory corruption. The CVSS 3.1 base score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The vendor recommends upgrading to version 2.4.68 to remediate this issue.
Potential Impact
Successful exploitation could allow remote attackers to execute arbitrary code or cause a denial of service on affected Apache HTTP Server instances. The vulnerability affects confidentiality, integrity, and availability of the server.
Mitigation Recommendations
Upgrade Apache HTTP Server to version 2.4.68 or later, which contains the fix for this vulnerability. Patch status is confirmed by the vendor advisory recommending this upgrade. No other mitigations are specified.
CVE-2026-44631: CWE-124: Buffer Underwrite in Apache Software Foundation Apache HTTP Server
Description
A critical buffer underwrite vulnerability (CWE-124) exists in Apache HTTP Server versions from 2.4.0 through 2.4.67. The flaw is triggered by crafted regular expressions in the server configuration. This vulnerability allows an attacker to potentially execute arbitrary code or cause denial of service. The issue is fixed in Apache HTTP Server version 2.4.68.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-44631 is a buffer underwrite vulnerability in Apache HTTP Server affecting versions 2.4.0 through 2.4.67. The vulnerability arises from improper handling of crafted regular expressions in the server configuration, which can lead to memory corruption. The CVSS 3.1 base score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The vendor recommends upgrading to version 2.4.68 to remediate this issue.
Potential Impact
Successful exploitation could allow remote attackers to execute arbitrary code or cause a denial of service on affected Apache HTTP Server instances. The vulnerability affects confidentiality, integrity, and availability of the server.
Mitigation Recommendations
Upgrade Apache HTTP Server to version 2.4.68 or later, which contains the fix for this vulnerability. Patch status is confirmed by the vendor advisory recommending this upgrade. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-05-07T12:39:02.065Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a26e468e29bf47b501e3130
Added to database: 06/08/2026, 15:48:56 UTC
Last enriched: 06/24/2026, 17:18:38 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 357
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