Apache Tomcat Rewrite rule bypass
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat. For a subset of unlikely rewrite rule configurations, it was possible for a specially crafted request to bypass some rewrite rules. If those rewrite rules effectively enforced security constraints, those constraints could be bypassed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.5, from 10.1.0-M1 through 10.1.39, from 9.0.0.M1 through 9.0.102. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6, which fix the issue.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-31651US | critical9.8 | Exploit | ||
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat. For a subset of unlikely rewrite rule configurations, it was possible
for a specially… | ||||
references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2025/04/28/3WEB
- https://github.com/apache/tomcatPACKAGE
- https://github.com/apache/tomcat/commit/066bf6b6a15a4e7e0941d4acf096841165b97098WEB
- https://github.com/apache/tomcat/commit/175dc75fc428930034a6c93fb52f830d955d8e64WEB
- https://github.com/apache/tomcat/commit/ee3ab548e92345eca0cbd1f01649eb36c6f29454WEB
- https://github.com/apache/tomcat/commit/fbecc915a10c5a3d634c5e2c6ced4ff479ce9953WEB
- https://lists.apache.org/list.html?announce@tomcat.apache.orgWEB
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.htmlWEB
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