BIT-keycloak-2026-9086

    Dashboard / Vulnerabilities / BIT-keycloak-2026-9086

    BIT-keycloak-2026-9086

    Published: 25 Aug 2026Last Modified: 29 Oct 2026

    Summary: Keycloak: keycloak: cross-site scripting (xss) via case-insensitive uri validation bypass

    Details: A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with `manage-client` permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a specially crafted redirect URI using a case-insensitive `javascript:` or `data:` scheme. This Cross-Site Scripting (XSS) vulnerability allows for arbitrary code execution in the Keycloak origin when a victim clicks the crafted link, such as in the logout flow or the Admin Console.

    References: https://access.redhat.com/errata/RHSA-2026:30049, https://access.redhat.com/errata/RHSA-2026:30050, https://access.redhat.com/errata/RHSA-2026:30083, https://access.redhat.com/errata/RHSA-2026:30084, https://access.redhat.com/security/cve/CVE-2026-9086, https://bugzilla.redhat.com/show_bug.cgi?id=2480170, https://nvd.nist.gov/vuln/detail/CVE-2026-9086, https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9086.json

    Affected packages

    Package

    Name: keycloak

    Purl: pkg:bitnami/keycloak

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 26.4.0
    Fixed -26.4.13

    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
    BIT-keycloak-2026-9086 | CVE-DB