BIT-tomcat-2026-68763

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    BIT-tomcat-2026-68763

    Published: 31 Aug 2026Last Modified: 8 Sept 2026

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

    Details: 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 through 11.0.24, from 10.1.0 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.

    References: http://www.openwall.com/lists/oss-security/2026/08/26/9, https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl, https://nvd.nist.gov/vuln/detail/CVE-2026-68763

    Affected packages

    Package

    Name: tomcat

    Purl: pkg:bitnami/tomcat

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 8.5.59
    Fixed -9.0.121

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High