High severity7.5NVD Advisory· Published Aug 25, 2026· Updated Aug 27, 2026
CVE-2026-65927
CVE-2026-65927
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8- osv-coords7 versionspkg:bitnami/tomcatpkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/tomcat10&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat10&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/tomcat11&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat11&distro=openSUSE%20Tumbleweed
>= 8.5.0, < 9.0.121+ 6 more
- (no CPE)range: >= 8.5.0, < 9.0.121
- (no CPE)range: < 9.0.121-160000.1.1
- (no CPE)range: < 9.0.121-1.1
- (no CPE)range: < 10.1.59-160000.1.1
- (no CPE)range: < 10.1.59-1.1
- (no CPE)range: < 11.0.25-160000.1.1
- (no CPE)range: < 11.0.25-1.1
Patches
Vulnerability mechanics
References
2- www.openwall.com/lists/oss-security/2026/08/26/5nvdThird Party AdvisoryMailing List
- lists.apache.org/thread/st1dx1zyn5y7ny2s0sscmh6lrv3worr4nvdVendor AdvisoryMailing List
News mentions
2- Apache Tomcat Vulnerabilities Let Attackers Bypass Security Controls and Crash ServersCyber Security News · Aug 27, 2026
- Apache: 25 Vulnerabilities Across Tomcat, Camel, Hive, and More Disclosed Aug 24-26Vypr Intelligence · Aug 26, 2026