CVE-2026-56154 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact total

No data.

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
http://www.openwall.com/lists/oss-security/2026/10/01/17
https://httpd.apache.org/security/vulnerabilities_24.html

History

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

Type	Values Removed	Values Added
References		http://www.openwall.com/lists/oss-security/2026/10/01/17

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

Projects

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MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-10-01T16:03:52.280Z

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

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

Link: CVE-2026-56154

Vulnrichment

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

NVD

Status : Awaiting Analysis

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

Modified: 2026-10-01T21:17:22.267

Link: CVE-2026-56154

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-10-01T22:15:13Z

Weaknesses

CWE-416

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