CVE-2026-43951

CVE-2026-43951: Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash

Vendor Apache Software Foundation

Product Apache HTTP Server

Weakness CWE-125

Published June 8, 2026

Last update June 8, 2026

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CVSS base score

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What the vulnerability does

Description

Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

Key dates

Disclosure timeline

June 8, 2026 CVE published

June 8, 2026 Record updated