Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | >= 8.5.0, < 9.0.121 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/st1dx1zyn5y7ny2s0sscmh6lrv3worr4Vendor AdvisoryMailing List
- http://www.openwall.com/lists/oss-security/2026/08/26/5Third Party AdvisoryMailing List
FAQ
What is CVE-2026-65927?
CVE-2026-65927 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 affec...
How severe is CVE-2026-65927?
CVE-2026-65927 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-65927?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Tomcat.