# CVE-2026-68763

## Summary

- **CVE ID:** CVE-2026-68763
- **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-400
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 26, 2026

## Description

Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset



This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120.



The following versions were EOL at the time the CVE was created but are 
known to be affected: from 8.5.59 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 (9.0.39)
- Apache Software Foundation — Apache Tomcat (8.5.59)
- Apache Software Foundation — Apache Tomcat (0)

## References

- [CNA](https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl)
- [CVE](http://www.openwall.com/lists/oss-security/2026/08/26/9)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.83%
- **EPSS Percentile:** 55.4

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