GHSA-w3g8-r9gw-qrh8

    Dashboard / Vulnerabilities / GHSA-w3g8-r9gw-qrh8

    GHSA-w3g8-r9gw-qrh8

    Published: 13 Jan 2025Last Modified: 10 Sept 2026

    Summary: Denial of Service in Keycloak Server via Security Headers

    Details: A potential Denial of Service (DoS) vulnerability has been identified in Keycloak, which could allow an administrative user with the rights to change realm settings to disrupt the service. This is done by modifying any of the security headers and inserting newlines, which causes the Keycloak server to write to a request that is already terminated, leading to a failure of said request. Service disruption may happen, users will be unable to access applications relying on Keycloak, or any of the consoles provided by Keycloak itself on the affected realm.

    References: https://github.com/keycloak/keycloak/security/advisories/GHSA-w3g8-r9gw-qrh8, https://nvd.nist.gov/vuln/detail/CVE-2024-11734, https://github.com/keycloak/keycloak/commit/93b2a7327b2557eb132a8169086c5e63c81dff79, https://access.redhat.com/errata/RHSA-2025:0299, https://access.redhat.com/errata/RHSA-2025:0300, https://access.redhat.com/security/cve/CVE-2024-11734, https://bugzilla.redhat.com/show_bug.cgi?id=2328846, https://github.com/keycloak/keycloak

    Affected packages

    Package

    Name: org.keycloak:keycloak-quarkus-server

    Purl: pkg:maven/org.keycloak/keycloak-quarkus-server

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -26.0.8

    Affected versions

    12.0.0
    12.0.1
    12.0.2
    12.0.3
    12.0.4

    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-w3g8-r9gw-qrh8 | CVE-DB