Description
Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...})



This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Published: 2026-10-01
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
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Remediation

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History

Mon, 05 Oct 2026 13:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

Sun, 04 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache http Server
Vendors & Products Apache
Apache http Server

Thu, 01 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
References

Thu, 01 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Description Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Title Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}
Weaknesses CWE-416
References

Subscriptions

Apache Http Server
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-01T20:09:23.709Z

Reserved: 2026-06-19T12:42:54.699Z

Link: CVE-2026-56154

cve-icon Vulnrichment

Updated: 2026-10-01T20:09:23.709Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-01T17:17:26.610

Modified: 2026-10-05T13:33:38.377

Link: CVE-2026-56154

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-04T20:58:15Z

Weaknesses