{"id":"CVE-2026-104084","revision":"c5429403854a432a83a809896cf0085d","records":[{"revision":"c5429403854a432a83a809896cf0085d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-104084","aliases":[],"title":"SmarterMail < Build 9777 Stale JWT Role Claim Privilege Escalation via Refresh Token","description":"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.","state":0,"publishedAt":"2026-10-09T15:08:23.453+00:00","modifiedAt":"2026-10-12T13:38:12.686+00:00","affected":[{"ecosystem":"Vendor product","name":"Smartermail","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"vendor\": \"Smartertools\",\n                    \"product\": \"Smartermail\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"Build 9777\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://www.smartertools.com/smartermail/release-notes/current#/9526:~:text=Build%209777%20(Oct%208%2C%202026)","https://blog.evan.lat/posts/sm/","https://www.vulncheck.com/advisories/smartermail-build-9777-stale-jwt-role-claim-privilege-escalation-via-refresh-token"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104084","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104084","identifiers":["CVE-2026-104084"]},"retained":false,"historicalAffected":[]}],"coverage":[]}