{"id":"CVE-2026-33758","summary":"OpenBao has Reflected XSS in its OIDC authentication error message","details":"OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao installations that have an OIDC/JWT authentication method enabled and a role with `callback_mode=direct` configured are vulnerable to XSS via the  `error_description` parameter on the page for a failed authentication. This allows an attacker access to the token used in the Web UI by a victim. The `error_description` parameter has been replaced with a static error message in v2.5.2. The vulnerability can be mitigated by removing any roles with `callback_mode` set to `direct`.","aliases":["GHSA-cpj3-3r2f-xj59","GO-2026-4862"],"modified":"2026-04-10T05:42:55.595399Z","published":"2026-03-27T14:12:33.941Z","related":["SUSE-SU-2026:1135-1","openSUSE-SU-2026:10438-1"],"database_specific":{"cwe_ids":["CWE-116","CWE-20","CWE-79"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33758.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33758.json"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662"},{"type":"FIX","url":"https://github.com/openbao/openbao/pull/2709"},{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.5.2"},{"type":"ADVISORY","url":"https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33758"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openbao/openbao","events":[{"introduced":"0"},{"fixed":"932fcf892eba8d646a9bfc58a59ea3b2475b17fa"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2.5.2"}]}}],"versions":["api/auth/approle/v0.1.0","api/auth/approle/v0.1.1","api/auth/approle/v0.2.0","api/auth/approle/v0.3.0","api/auth/approle/v0.4.0","api/auth/approle/v0.4.1","api/auth/approle/v1.1.0-development20240408","api/auth/approle/v2.0.1","api/auth/approle/v2.2.0","api/auth/approle/v2.3.0","api/auth/approle/v2.4.0","api/auth/approle/v2.5.0","api/auth/approle/v2.5.1","api/auth/aws/v0.1.0","api/auth/aws/v0.2.0","api/auth/aws/v0.3.0","api/auth/aws/v0.4.0","api/auth/aws/v0.4.1","api/auth/aws/v1.1.0-development20240408","api/auth/azure/v0.1.0","api/auth/azure/v0.2.0","api/auth/azure/v0.3.0","api/auth/azure/v0.4.0","api/auth/azure/v0.4.1","api/auth/azure/v1.1.0-development20240408","api/auth/gcp/v0.1.0","api/auth/gcp/v0.2.0","api/auth/gcp/v0.3.0","api/auth/gcp/v0.4.0","api/auth/gcp/v0.4.1","api/auth/gcp/v1.1.0-development20240408","api/auth/jwt/v2.4.0","api/auth/jwt/v2.5.0","api/auth/jwt/v2.5.1","api/auth/kubernetes/v1.1.0-development20240408","api/auth/kubernetes/v2.0.1","api/auth/kubernetes/v2.2.0","api/auth/kubernetes/v2.3.0","api/auth/kubernetes/v2.4.0","api/auth/kubernetes/v2.5.0","api/auth/kubernetes/v2.5.1","api/auth/ldap/v1.1.0-development20240408","api/auth/ldap/v2.0.1","api/auth/ldap/v2.2.0","api/auth/ldap/v2.3.0","api/auth/ldap/v2.4.0","api/auth/ldap/v2.5.0","api/auth/ldap/v2.5.1","api/auth/userpass/v0.1.0","api/auth/userpass/v0.2.0","api/auth/userpass/v0.3.0","api/auth/userpass/v0.4.0","api/auth/userpass/v0.4.1","api/auth/userpass/v1.1.0-development20240408","api/auth/userpass/v2.0.1","api/auth/userpass/v2.2.0","api/auth/userpass/v2.3.0","api/auth/userpass/v2.4.0","api/auth/userpass/v2.5.0","api/auth/userpass/v2.5.1","api/v1.0.1","api/v1.0.2","api/v1.0.3","api/v1.0.4","api/v1.1.1","api/v1.100.0-development20240408","api/v1.2.0","api/v1.3.1","api/v1.5.0","api/v1.6.0","api/v1.7.0","api/v1.7.1","api/v1.7.2","api/v1.8.0","api/v1.8.1","api/v1.8.2","api/v1.8.3","api/v1.9.0","api/v1.9.1","api/v1.9.2","api/v2.0.1","api/v2.1.0","api/v2.2.0","api/v2.3.0","api/v2.4.0","api/v2.5.0","api/v2.5.1","before-plugin-removal","dev-namespaces-base-20250215","dev-namespaces-base-20250311","dev-namespaces-base-20250424","sdk/v0.1.10","sdk/v0.1.11","sdk/v0.1.12","sdk/v0.1.13","sdk/v0.1.8","sdk/v0.1.9","sdk/v0.2.1","sdk/v0.3.0","sdk/v0.4.1","sdk/v0.5.0","sdk/v0.5.1","sdk/v0.5.3","sdk/v0.6.0","sdk/v0.6.1","sdk/v0.6.2","sdk/v0.7.0","sdk/v0.8.0","sdk/v0.9.0","sdk/v0.9.1","sdk/v1.100.0-development20240408","sdk/v2.0.1","sdk/v2.1.0","sdk/v2.2.0","sdk/v2.3.0","sdk/v2.4.0","sdk/v2.5.0","sdk/v2.5.1","v2.0.0","v2.0.0-alpha20240329","v2.0.0-beta20240618","v2.1.0-beta20241114","v2.1.0-beta20241114.1","v2.1.0-beta20241114.2","v2.1.0-beta20241114.3","v2.2.0-beta20250213","v2.3.0-beta20250528","v2.4.0","v2.5.0","v2.5.0-beta20251125","v2.5.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33758.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}]}