CVE-2021-3856

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.

• CWE-552
• CWE-22

• https://access.redhat.com/security/cve/CVE-2021-3856Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2010164Issue Tracking, Vendor Advisory
• https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743Patch, Third Party Advisory
• https://github.com/keycloak/keycloak/pull/8588Patch, Third Party Advisory
• https://issues.redhat.com/browse/KEYCLOAK-19422Permissions Required, Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2021-3856Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2010164Issue Tracking, Vendor Advisory
• https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743Patch, Third Party Advisory
• https://github.com/keycloak/keycloak/pull/8588Patch, Third Party Advisory
• https://issues.redhat.com/browse/KEYCLOAK-19422Permissions Required, Vendor Advisory

Published

Aug 26, 2022

Last Modified

Jun 17, 2026

Status

Modified

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