CVE-2026-44631

CRITICAL

Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow

Title source: cna
STIX 2.1

Description

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.0049
EPSS Percentile 38.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-124
Status published
Products (2)
apache/http_server 2.4.0 - 2.4.68
Apache Software Foundation/Apache HTTP Server 2.4.0 - 2.4.67
Published Jun 08, 2026
Tracked Since Jun 08, 2026