CVE-2026-56154: Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}
Published Oct 1, 2026
·Updated
Apache HTTP Server: modrewrite use-after-free via %{LA-U:HTTP:...}
Other sources
Use After Free vulnerability in Apache HTTP Server's modrewrite when using lookahead (%{LA-U:HTTP:...})
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
— MITRE
Affected Software
3 affected componentsFixes available
Apache HTTP Server>=2.4.0<=2.4.68
Apache HTTP Server>=2.4.0<2.4.69
Microsoft azl3 httpd 2.4.68-1<2.4.69-1
2.4.69-1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 2.4.69-1
Event History
Oct 1, 2026
CVE Published
via MITRE·04:03 PM
Data Sourced
via MITRE·04:03 PM
DescriptionWeakness
Data Sourced
via NVD·05:17 PM
DescriptionSeverityWeaknessAffected Software
Oct 9, 2026
Data Sourced
via Microsoft·08:17 AM
DescriptionSeverityWeaknessAffected Software