Out-of-bounds write in Apache HTTP Server - CVE-2026-44631
Published: June 8, 2026
Vulnerability identifier: #VU133898
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-44631
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Apache Foundation
Affected software:
Apache HTTP Server
Apache HTTP Server
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to out-of-bounds write in ap_regname when processing crafted regular expressions in the configuration. A local user can place crafted regular expressions in the configuration to cause a denial of service.
How to mitigate CVE-2026-44631
Install security update from vendor's website.