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Tool Directory

CVE-2026-71206

HighPublished

shiori - JWT CheckToken Never Re-Validates Account State, Allowing Stale-Privilege Access After Deletion or Demotion

Published: Aug 5, 2026
Updated: Aug 10, 2026
Assigning CNA: TuranSec
Evidence observed: Aug 17, 2026

Primary CVSS

8.3/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 20.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Shiori's CheckToken function (internal/domains/auth.go) validates only the JWT's HMAC signature and returns the embedded claims.Account object unmodified, never re-fetching the account from the database. No session store or token-revocation mechanism exists in the codebase.

Sources

CVE-2026-71206-PoCPoC
PoC: Shiori JWT CheckToken never re-validates account state (CVE-2026-71206, High 8.2)

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