CVE-2026-65927 — Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control

Description (CNA)

Off-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.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Tomcat	affected 11.0.0-M1 through 11.0.24; affected 10.1.0-M1 through 10.1.57; affected 9.0.0.M1 through 9.0.120; affected 8.5.0 through 8.5.100; unaffected 7.0.0 through 7.0.109; unaffected 0 before 7.0.0

CWE

CWE-193

References

https://lists.apache.org/thread/st1dx1zyn5y7ny2s0sscmh6lrv3worr4

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/08/26/5

CISA-ADP

No English description supplied.

No references supplied.