Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68763
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-25 22:17:05 UTC
Updated2026-08-25 22:17:05 UTC
DescriptionUncontrolled 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.

Risk And Classification

Problem Types: CWE-400 | CWE-400 CWE-400 Uncontrolled Resource Consumption

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Tomcat affected 11.0.0-M1 11.0.24 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 10.1.0-M1 10.1.57 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 9.0.39 9.0.120 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 8.5.59 8.5.100 semver Not specified
CNA Apache Software Foundation Apache Tomcat unaffected 7.0.109 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl [email protected] lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Zhen Kong (en)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report