Double free in Apache HTTP Server - CVE-2026-23918

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Main Vulnerability Database Vulnerabilities #VU129550

Double free in Apache HTTP Server - CVE-2026-23918

Published: May 4, 2026


Vulnerability identifier: #VU129550
CSH Severity: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-23918
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Apache HTTP Server
Software vendor:
Apache Foundation

Description

The vulnerability allows a remote attacker to cause a denial of service and possibly execute arbitrary code.

The vulnerability exists due to a double free in Apache HTTP Server HTTP/2 handling when processing an early reset. A remote attacker can trigger an early reset condition to cause a denial of service and possibly execute arbitrary code.

The issue is specific to the HTTP/2 protocol.


Remediation

Install security update from vendor's website.

External links