CVE-2026-104084
highpriority · track · 35EPSS 0.003 · 24 %ileDEEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.3–8.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3869SmarterTools SmarterMail: Mehrere SchwachstellenDeutsch2026-10-11csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in SmarterTools SmarterMail ausnutzen, um beliebigen Code mit SYSTEM-Rechten auszuführen, erhöhte Rechte auch weiterhin zu behalten, nachdem die Administratorrechte entzogen wurden, Cross-Site-Scripting-Angriffe zu starten, Sicherheitsmaßnahmen zu umgehen, Daten offenzulegen oder zu manipulieren sowie weitere, unspezifizierte Angriffe durchzuführen.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
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