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.
History

Thu, 27 Aug 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Apache tomcat
CPEs cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
Vendors & Products Apache tomcat

Wed, 26 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 26 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
References

Wed, 26 Aug 2026 02:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache apache Tomcat
Vendors & Products Apache
Apache apache Tomcat

Tue, 25 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
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.
Title Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset
Weaknesses CWE-400
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-08-25T22:00:37.047Z

Updated: 2026-08-26T18:36:43.341Z

Reserved: 2026-07-31T15:42:11.281Z

Link: CVE-2026-68763

cve-icon Vulnrichment

Updated: 2026-08-26T02:30:41.764Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-25T22:17:05.970

Modified: 2026-08-27T13:02:31.670

Link: CVE-2026-68763

cve-icon Redhat

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