Riskcovery

CVE-2026-68763

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

State
Published
Severity
7.5 High
Published
Aug 25, 2026
Updated
Aug 26, 2026
Reserved
Jul 31, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCISA-ADP

Weaknesses

  • CWE-400 Uncontrolled Resource Consumption

Affected Products

ProductVersions
Apache TomcatApache Software Foundation
  • 11.0.0-M1 through 11.0.24Affected
  • 10.1.0-M1 through 10.1.57Affected
  • 9.0.39 through 9.0.120Affected
  • 8.5.59 through 8.5.100Affected
  • 7.0.109 and earlierNot affected

References

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