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    CVE-2026-82965

    A flaw was found in the SAML implementation of Keycloak, an open-source identity and access management solution. The SAML Artifact Resolution and ECP SOAP endpoints do not properly limit the size or complexity of incoming XML requests. An unauthenticated remote attacker can exploit this by sending specially crafted, large XML messages that cause the server to consume excessive memory. This leads to the application running out of memory and crashing, resulting in a denial of service for all users.

    Published:Nov 5, 2026
    Last Modified:Nov 5, 2026
    EPS:Nov 5, 2026
    EPSS Score:
    CVSS Score:7.5

    Affected Products

    Vendor
    Redhat
    Product
    Build Keycloak
    Vendor
    Redhat
    Product
    Red Hat Single Sign On

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-97847 (CVSS 7.1) — A flaw was found in the protocol mapper and identity resolution components of Keycloak. The issue occurs when …
    CVE-2026-97175 (CVSS 8.8) — A flaw was found in the idp-auto-link authenticator of the keycloak-services component, which handles user ide…
    CVE-2026-97174 (CVSS 6.8) — A flaw was found in the Client-Initiated Backchannel Authentication (CIBA) implementation of Keycloak. The CIB…
    CVE-2026-96453 (CVSS 8) — A flaw was found in the Keycloak Admin CLI kcadm tool, which is used by administrators to manage Keycloak serv…
    CVE-2026-93998 (CVSS 7.4) — A flaw was found in the SAML adapter component of Keycloak, which is used to secure applications with SAML-bas…
    CVE-2026-92857 (CVSS 8.1) — Keycloak provides a Dynamic Client Registration feature that allows users with specific tokens to register the…
    CVE-2026-92855 (CVSS 7.4) — A flaw was found in the SAML identity broker component of Keycloak, which is used to delegate authentication t…
    CVE-2026-114232 (CVSS 8.1) — A flaw was found in the UserManagedPermissionService of the Keycloak authorization server. The UMA Protection …
    CVE-2026-112208 (CVSS 8.1) — A flaw was found in the Organization identity-first login flow of the Keycloak authentication server. Keycloak…
    CVE-2026-110932 (CVSS 7.5) — A flaw was found in the theme resource endpoint of Keycloak, an open-source identity and access management sol…

    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
    CVE-2026-82965 — Redhat (High 7.5) | CVE-DB