{"id":"CVE-2026-33758","aliases":["BIT-openbao-2026-33758","GHSA-cpj3-3r2f-xj59","GO-2026-4862"],"url":"https://o3.security/vulnerability/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`.","published":"2026-03-27T14:12:33.941Z","modified":"2026-08-12T03:51:16.746231770Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","fixedVersion":"0.0.0-20260325133417-6e2b2dd84f0e"}],"fix":{"url":"https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662","label":"openbao/openbao@6e2b2dd"},"references":[{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.5.2"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33758.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-33758"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33758.json"},{"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"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452294"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662"},{"type":"FIX","url":"https://github.com/openbao/openbao/pull/2709"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.746231770Z"}}