{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33758","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-23T18:30:14.125Z","datePublished":"2026-03-27T14:12:33.941Z","dateUpdated":"2026-06-30T12:07:32.723Z"},"containers":{"cna":{"title":"OpenBao has Reflected XSS in its OIDC authentication error message","problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-116","lang":"en","description":"CWE-116: Improper Encoding or Escaping of Output","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":9.4,"baseSeverity":"CRITICAL","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59","tags":["x_refsource_CONFIRM"],"url":"https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59"},{"name":"https://github.com/openbao/openbao/pull/2709","tags":["x_refsource_MISC"],"url":"https://github.com/openbao/openbao/pull/2709"},{"name":"https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662","tags":["x_refsource_MISC"],"url":"https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662"},{"name":"https://github.com/openbao/openbao/releases/tag/v2.5.2","tags":["x_refsource_MISC"],"url":"https://github.com/openbao/openbao/releases/tag/v2.5.2"}],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-27T14:12:33.941Z"},"descriptions":[{"lang":"en","value":"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`."}],"source":{"advisory":"GHSA-cpj3-3r2f-xj59","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-27T18:55:28.333530Z","id":"CVE-2026-33758","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-27T19:58:18.047Z"}},{"affected":[{"cpes":["cpe:/a:redhat:cryostat:4"],"defaultStatus":"unaffected","product":"Cryostat 4","vendor":"Red Hat"}],"datePublic":"2026-03-27T14:12:33.941Z","descriptions":[{"lang":"en","value":"A flaw was found in OpenBao. Installations that have an OIDC/JWT authentication method enabled with a role configured to use `callback_mode=direct` are vulnerable to XSS via the `error_description` parameter on the page for a failed authentication. This allows an attacker to access the token used by an authenticated user in the Web UI."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":9.6,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-33758"},{"name":"RHBZ#2452294","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452294"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33758.json"}],"timeline":[{"lang":"en","time":"2026-03-27T15:03:38.602Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-03-27T14:12:33.941Z","value":"Made public."}],"title":"OpenBao: reflected XSS in OpenBao OIDC authentication error message","x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-06-30T12:07:32.723Z"}}]}}