{"id":"CVE-2026-42354","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-42354","generatedAt":"2026-10-28T02:24:11.184Z","title":"From version 21.12.0 to before version 26.4.1, a critical vulnerability was discovered in the SAML SSO implementation of Sentry.","description":"Sentry is an error tracking and performance monitoring tool. From version 21.12.0 to before version 26.4.1, a critical vulnerability was discovered in the SAML SSO implementation of Sentry. The vulnerability allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance. The victim email address must be known in order to exploit this vulnerability. This issue has been patched in version 26.4.1.","published":"2026-05-08T23:16:39.000Z","lastModified":"2026-07-24T21:10:00.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-290"],"affected":["sentry/sentry"],"epss":{"score":0.00623,"percentile":0.49595,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/getsentry/sentry/commit/0c67558ae7fe08738912d4c5233b53ead048da3b","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/getsentry/sentry/pull/113720","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/getsentry/sentry/releases/tag/26.4.1","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/getsentry/sentry/security/advisories/GHSA-rcmw-7mc7-3rj7","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-42354","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}