{"schema":"threatline.record/2","record":{"id":"CVE-2026-104084","aliases":[],"summary":"SmarterMail < Build 9777 Stale JWT Role Claim Privilege Escalation via Refresh Token","details":"SmarterMail before build 9777 contains a privilege escalation vulnerability where JWT access and refresh tokens embed a role claim at issuance that is not revalidated against the account's current role when redeemed through POST /api/v1/auth/refresh-token. Attackers who capture a refresh token issued before an administrator demotion, or a demoted user whose session was not actively polling at the time of demotion, can replay the stale token to obtain a new access token retaining the higher-privilege role (such as DomainAdmin or SysAdmin) until natural token expiry.","categories":["Unclassified"],"product":"Smartermail","vendor":"Smartertools","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104084","source_modified_at":"2026-10-12T13:38:12.686Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Smartermail","vendor":"Smartertools","versions":[{"status":"affected","version":"0","versionType":"custom","lessThan":"Build 9777"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00274,"percentile":0.18785,"score_date":"2026-10-23"},"published_at":"2026-10-09T15:08:23.453Z","modified_at":"2026-10-12T13:38:12.686Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104084","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-12T13:38:12.686Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104084","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.smartertools.com/smartermail/release-notes/current#/9526:~:text=Build%209777%20(Oct%208%2C%202026)","tags":["release-notes","patch"]},{"source":"CVE List","url":"https://blog.evan.lat/posts/sm/","tags":["technical-description","exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/smartermail-build-9777-stale-jwt-role-claim-privilege-escalation-via-refresh-token","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-09T19:38:15.226857Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-12T13:38:12.686Z","content_hash":"4e80c1fd5bb9d0803137e1fdf0339d4601e201439e54bdf899665c4f061d66b8"}}