CVE-2026-68763 — Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset

Description (CNA)

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 (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Tomcat	affected 11.0.0-M1 through 11.0.24; affected 10.1.0-M1 through 10.1.57; affected 9.0.39 through 9.0.120; affected 8.5.59 through 8.5.100; unaffected 0 through 7.0.109

CWE

CWE-400

References

https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/08/26/9

CISA-ADP

No English description supplied.

No references supplied.