# CVE-2026-65927

## Summary

- **CVE ID:** CVE-2026-65927
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-193
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 26, 2026

## 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.

## Affected Products

- Apache Software Foundation — Apache Tomcat (11.0.0-M1)
- Apache Software Foundation — Apache Tomcat (10.1.0-M1)
- Apache Software Foundation — Apache Tomcat (9.0.0.M1)
- Apache Software Foundation — Apache Tomcat (8.5.0)
- Apache Software Foundation — Apache Tomcat (7.0.0)
- Apache Software Foundation — Apache Tomcat (0)

## References

- [CNA](https://lists.apache.org/thread/st1dx1zyn5y7ny2s0sscmh6lrv3worr4)
- [CVE](http://www.openwall.com/lists/oss-security/2026/08/26/5)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.78%
- **EPSS Percentile:** 53.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._