Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-65927
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-25 22:17:05 UTC
Updated2026-08-25 22:17:05 UTC
DescriptionOff-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.

Risk And Classification

Problem Types: CWE-193 | CWE-193 CWE-193 Off-by-one Error

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Tomcat affected 11.0.0-M1 11.0.24 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 10.1.0-M1 10.1.57 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 9.0.0.M1 9.0.120 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 8.5.0 8.5.100 semver Not specified
CNA Apache Software Foundation Apache Tomcat unaffected 7.0.0 7.0.109 semver Not specified
CNA Apache Software Foundation Apache Tomcat unaffected 7.0.0 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/st1dx1zyn5y7ny2s0sscmh6lrv3worr4 [email protected] lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: 4ra1n, pyn3rd and unam4 (en)

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