Bug 2524166 (CVE-2026-68763) - CVE-2026-68763 org.apache.tomcat/tomcat: Apache Tomcat: Denial of Service via HTTP/2 allocation leak
Summary: CVE-2026-68763 org.apache.tomcat/tomcat: Apache Tomcat: Denial of Service via...
Keywords:
Status: NEW
Alias: CVE-2026-68763
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-25 22:11 UTC by OSIDB Bzimport
Modified: 2026-08-31 18:01 UTC (History)
10 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-25 22:11:21 UTC 
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.
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