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    CVE-2026-118959

    A flaw was found in the required action provider mechanism of Keycloak. The issue occurs when an authorization request includes the kc_action query parameter set to a mandatory action already assigned to the user, such as profile verification or terms and conditions. Due to incorrect handling of application-initiated actions, Keycloak may skip these mandatory challenges and issue an authorization code. This can allow a user to bypass administrative requirements and gain access to the application without completing necessary profile updates or agreeing to terms.

    Published:Oct 28, 2026
    Last Modified:Oct 30, 2026
    EPS:Oct 30, 2026
    EPSS Score:
    CVSS Score:5.4

    Affected Products

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

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

    CVE-2026-117688 (CVSS 5.3) — A flaw was found in the client registration component of Keycloak, an open-source identity and access manageme…
    CVE-2026-118947 (CVSS 4.3) — A flaw was found in the UMA resource registration endpoint of the keycloak-services component, which provides …
    CVE-2026-118425 (CVSS 6.8) — A flaw was found in the secure-redirect-uris-enforcer client policy of Keycloak, an identity and access manage…
    CVE-2026-117627 (CVSS 5.4) — A flaw was found in the JWT Authorization Grant implementation of the keycloak-services component. When an OID…
    CVE-2026-117859 (CVSS 5.4) — A flaw was found in the Pushed Authorization Request PAR implementation of the keycloak-services component. Th…
    CVE-2026-118030 (CVSS 4.2) — A flaw was found in the HOTP authentication mechanism of the keycloak-services component, which provides ident…
    CVE-2026-114438 (CVSS 4.2) — A flaw was found in the Update User Locale required action of the Keycloak identity and access management solu…
    CVE-2026-109082 (CVSS 6.8) — A flaw was found in the Client-Initiated Backchannel Authentication CIBA implementation within the keycloak-se…
    CVE-2026-107889 (CVSS 5.5) — A flaw was found in the login theme rendering component of Keycloak. The issue occurs because the security fil…
    CVE-2026-107604 (CVSS 4.9) — A flaw was found in the installation provider and client registration endpoints of the Keycloak identity manag…

    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-2026-118959 — Redhat (Medium 5.4) | CVE-DB