CVE-2026-44631 | Buffer Underwrite vulnerability in Apache HTTP Server on cra… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-44631
State: PUBLISHED
Assigner: apache
Reserved: 2026-05-07 12:39 UTC
Published: 2026-06-08 15:19 UTC
Last updated: 2026-06-08 22:32 UTC
Primary CWE: CWE-124
CWE-124: Buffer Underwrite
Vendor / Product: Apache Software Foundation / Apache HTTP Server
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Apache Software Foundation	Apache HTTP Server	—	2.4.0 ≤ 2.4.67

Weakness (CWE)

CWE	Source	Description
CWE-124	cna	CWE-124: Buffer Underwrite

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (1)

https://httpd.apache.org/security/vulnerabilities_24.html