CVE-2026-56154

Severity: Critical

Published: 2026-10-01

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.

Exploit evidence

No public exploit evidence reported by NVD

Last checked: 2026-10-05 13:44 UTC

No exploitation evidence · CISA Coordinator (Assessed 2026-10-01 19:05 UTC)

NVD evidence for CVE-2026-56154 is reported, not independently verified by Package Alert. It does not establish exploit reliability or applicability to a particular package or environment.

References

Fix Status by Distribution

Fix evidence last checked: 2026-10-24 20:47 UTC

Fixed in:

AlmaLinux 9
- ALSA-2026:88229 · Published 2026-10-22
Debian 13 (Trixie)
- DSA-6569-1 · Published 2026-10-16
Oracle Linux 9
- ELSA-2026-88229 · Published 2026-10-22
Red Hat Enterprise Linux 9
- RHSA-2026:88229 · Published 2026-10-22
Rocky Linux 9
- RLSA-2026:88229 · Published 2026-10-23
Ubuntu 22.04 LTS (Jammy Jellyfish)
- USN-8898-1 · Published 2026-10-07
Ubuntu 24.04 LTS (Noble Numbat)
- USN-8898-1 · Published 2026-10-07
Ubuntu 26.04 LTS (Resolute Raccoon)
- USN-8898-1 · Published 2026-10-07

No fix evidence found:

AlmaLinux 10

AlmaLinux 8

Debian 11 (Bullseye)

Debian 12 (Bookworm)

Oracle Linux 10

Oracle Linux 8

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 7 (Extended Lifecycle Support)

Red Hat Enterprise Linux 8

Rocky Linux 10

Rocky Linux 8

SUSE Linux Enterprise Server 12 SP5

SUSE Linux Enterprise Server 15 SP5

SUSE Linux Enterprise Server 15 SP6

SUSE Linux Enterprise Server 15 SP7

SUSE Linux Enterprise Server 16

Ubuntu 25.04 (Plucky Puffin)

Ubuntu 25.10 (Questing Quokka)

Ubuntu 26.10 (Stonking Stingray)

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