GHSA-qq5r-98hh-rxc9

    Dashboard / Vulnerabilities / GHSA-qq5r-98hh-rxc9

    GHSA-qq5r-98hh-rxc9

    Published: 17 Feb 2026Last Modified: 11 Sept 2026

    Summary: Apache Tomcat - Security constraint bypass with HTTP/0.9

    Details: Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.

    References: https://nvd.nist.gov/vuln/detail/CVE-2026-24733, https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f, https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b, https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4, https://github.com/apache/tomcat, https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f, https://tomcat.apache.org/security-10.html, https://tomcat.apache.org/security-11.html, https://tomcat.apache.org/security-9.html

    Affected packages

    Package

    Name: org.apache.tomcat:tomcat-coyote

    Purl: pkg:maven/org.apache.tomcat/tomcat-coyote

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 11.0.0-M1
    Fixed -11.0.15

    Affected versions

    11.0.0
    11.0.0-M1
    11.0.0-M10
    11.0.0-M11
    11.0.0-M12
    11.0.0-M13
    11.0.0-M14
    11.0.0-M15
    11.0.0-M16
    11.0.0-M17
    11.0.0-M18
    11.0.0-M19
    11.0.0-M20
    11.0.0-M21
    11.0.0-M22
    11.0.0-M24
    11.0.0-M25
    11.0.0-M26
    11.0.0-M3
    11.0.0-M4
    11.0.0-M5
    11.0.0-M6
    11.0.0-M7
    11.0.0-M9
    11.0.1
    11.0.10
    11.0.11
    11.0.12
    11.0.13
    11.0.14
    11.0.2
    11.0.3
    11.0.4
    11.0.5
    11.0.6
    11.0.7
    11.0.8
    11.0.9

    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
    GHSA-qq5r-98hh-rxc9 | CVE-DB