{"id":"CVE-2026-33757","state":"PUBLISHED","title":"OpenBao lacks user confirmation for OIDC direct callback mode","description":"OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao does not prompt for user confirmation when logging in via JWT/OIDC and a role with `callback_mode` set to `direct`. This allows an attacker to start an authentication request and perform \"remote phishing\" by having the victim visit the URL and automatically log-in to the session of the attacker. Despite being based on the authorization code flow, the  `direct` mode calls back directly to the API and allows an attacker to poll for an OpenBao token until it is issued. Version 2.5.2 includes an additional confirmation screen for `direct` type logins that requires manual user interaction in order to finish the authentication. This issue can be worked around either by removing any roles with `callback_mode=direct` or enforcing confirmation for every session on the token issuer side for the Client ID used by OpenBao.","publishedAt":"2026-03-27T14:10:58.639Z","updatedAt":"2026-07-15T01:06:09.550Z","severity":{"score":9.6,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["openbao openbao"],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.2","status":"affected"}]}],"references":["https://github.com/openbao/openbao/security/advisories/GHSA-7q7g-x6vg-xpc3","https://github.com/openbao/openbao/commit/e32103951925723e9787e33886ab6b6ec20f4964","https://datatracker.ietf.org/doc/html/rfc8628#section-5.4","https://access.redhat.com/security/cve/CVE-2026-33757","https://bugzilla.redhat.com/show_bug.cgi?id=2452269","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33757.json"],"weaknesses":["CWE-384"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33757.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33757","state":"PUBLISHED","datePublished":"2026-03-27T14:10:58.639Z","dateUpdated":"2026-07-15T01:06:09.550Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-23T18:30:14.125Z"},"containers":{"cna":{"title":"OpenBao lacks user confirmation for OIDC direct callback mode","descriptions":[{"lang":"en","value":"OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao does not prompt for user confirmation when logging in via JWT/OIDC and a role with `callback_mode` set to `direct`. This allows an attacker to start an authentication request and perform \"remote phishing\" by having the victim visit the URL and automatically log-in to the session of the attacker. Despite being based on the authorization code flow, the  `direct` mode calls back directly to the API and allows an attacker to poll for an OpenBao token until it is issued. Version 2.5.2 includes an additional confirmation screen for `direct` type logins that requires manual user interaction in order to finish the authentication. This issue can be worked around either by removing any roles with `callback_mode=direct` or enforcing confirmation for every session on the token issuer side for the Client ID used by OpenBao."}],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.2","status":"affected"}]}],"references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-7q7g-x6vg-xpc3","name":"https://github.com/openbao/openbao/security/advisories/GHSA-7q7g-x6vg-xpc3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/openbao/openbao/commit/e32103951925723e9787e33886ab6b6ec20f4964","name":"https://github.com/openbao/openbao/commit/e32103951925723e9787e33886ab6b6ec20f4964","tags":["x_refsource_MISC"]},{"url":"https://datatracker.ietf.org/doc/html/rfc8628#section-5.4","name":"https://datatracker.ietf.org/doc/html/rfc8628#section-5.4","tags":["x_refsource_MISC"]}],"metrics":[{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-384","lang":"en","description":"CWE-384: Session Fixation","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-27T14:10:58.639Z"},"source":{"advisory":"GHSA-7q7g-x6vg-xpc3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-31T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-33757"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-01T03:55:23.497Z"}},{"title":"OpenBao: lack of user confirmation for OpenBao OIDC direct callback mode","descriptions":[{"lang":"en","value":"A flaw was found in OpenBao. A missing prompt for user confirmation when logging in via the JWT/OIDC authentication method with a role configured to use `callback_mode=direct` allows an attacker to initiate an authentication request and perform a \"remote phishing\" attack by tricking an authenticated user into visiting a crafted URL, automatically logging the user into the session of the attacker."}],"affected":[{"vendor":"Red Hat","product":"Cryostat 4","packageName":"cryostat/cryostat-storage-rhel9","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:cryostat:4"]}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-33757","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452269","name":"RHBZ#2452269","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33757.json","tags":["x_sadp-csaf-vex"]}],"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-384","description":"Session Fixation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat-SADP","orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","dateUpdated":"2026-07-15T01:06:09.550Z"},"datePublic":"2026-03-27T14:10:58.639Z","timeline":[{"lang":"en","time":"2026-03-27T15:01:52.669Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-03-27T14:10:58.639Z","value":"Made public."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"}}]}}}