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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History

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

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

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 : Undergoing Analysis

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

Modified: 2026-08-26T19:16:54.900

Link: CVE-2026-68763

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T02:30:04Z

Weaknesses