CVE-2021-3856

    Dashboard / Vulnerabilities / CVE-2021-3856

    CVE-2021-3856

    Published: 26 Aug 2022Last Modified: 7 Aug 2026

    Summary:

    Details: ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client, the client will receive the content of random files if available.

    References: https://access.redhat.com/security/cve/CVE-2021-3856, https://bugzilla.redhat.com/show_bug.cgi?id=2010164, https://issues.redhat.com/browse/KEYCLOAK-19422, https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743, https://github.com/keycloak/keycloak/pull/8588

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -843566019e09d15fa0e4778356463bc9a430e965

    Affected versions

    2.4.0.Test

    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-2021-3856 | CVE-DB