{"id":"CVE-2026-102899","summary":"Sentry: Improper authentication on SAML SSO process allows user identity linking","details":"Sentry is an application monitoring and error tracking platform. From 26.5.0 until 26.7.2, the SAML SSO identity-linking flow allows an attacker who controls a SAML identity provider to socially engineer an authenticated user into opening a malicious URL, link the attacker's identity to the victim's Sentry account, and take control of that account. The attack requires a browser that accepts the cross-site cookie context, including Firefox with SameSite=None cookies or Chromium with third-party cookies enabled. Sentry SaaS received the remediation on July 27, 2026, and self-hosted Sentry is fixed in version 26.7.2.","aliases":["GHSA-w699-8wff-fqxw"],"modified":"2026-10-15T10:47:27.165775182Z","published":"2026-10-14T18:57:50.768Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102899.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-287"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102899.json"},{"type":"WEB","url":"https://github.com/getsentry/self-hosted/releases/tag/26.7.2"},{"type":"FIX","url":"https://github.com/getsentry/sentry/commit/9c982d4bcb81c93e2db552084bcbb45cdd34bdd3"},{"type":"FIX","url":"https://github.com/getsentry/sentry/commit/ec963de4ec8c7f340f286c6f613e55458a9e5ddf"},{"type":"FIX","url":"https://github.com/getsentry/sentry/pull/120467"},{"type":"FIX","url":"https://github.com/getsentry/sentry/pull/120702"},{"type":"WEB","url":"https://github.com/getsentry/sentry/releases/tag/26.7.2"},{"type":"ADVISORY","url":"https://github.com/getsentry/sentry/security/advisories/GHSA-w699-8wff-fqxw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102899"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/getsentry/self-hosted","events":[{"introduced":"aed5b2037e74c771bfe476dbdbeb80420ef4a3d8"},{"fixed":"23a39a206db72cb0edc1b29d6fd595198ef10a0e"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"26.5.0"},{"fixed":"26.7.2"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102899.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}