CVE-2026-53404
Apache Tomcat: Bad ornext processing in RewriteValve
7.3
HIGH
CVSS 3.1
EPSS 0.41%
Description
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. This issue affects Apache Tomcat: from 11.0.0 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.0 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
How to fix CVE-2026-53404
To remediate CVE-2026-53404, upgrade the affected package to a fixed version below.
- —upgrade to 9.0.101 or later
Is CVE-2026-53404 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 9.0.101, >= 10.1.0, < 10.1.37, >= 11.0.0, < 11.0.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |