CVE-2026-56154: Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}

Overview

Severity

Critical (CVSS 9.8)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Oct

Released

2026-10-09

Last Updated

2026-10-10

EPSS Score

0.56% (percentile: 45.2%)

Affected Products (1)

Other

• 0-17084

Revision History

• 2026-10-09: Information published.
• 2026-10-10: Information published.