Unknown [CVE-2026-68763] 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
This security Apache Software Foundation advisory covers CVE-2026-68763 affecting Apache Tomcat.
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Summary
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.
- 11.0.0-M1 through 11.0.24
- 10.1.0-M1 through 10.1.57
- 9.0.39 through 9.0.120.
- 8.5.59 through 8.5.100.
- through 9.0.120
- through 8.5.100
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
- 11.0.25
- 10.1.58
- 9.0.121
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
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