go-shiori Token Validation internal/domains/auth.go CheckToken authorization

Summaryinfo

A vulnerability classified as critical was found in go-shiori shiori. The affected element is the function CheckToken of the file internal/domains/auth.go of the component Token Validation. The manipulation results in authorization. This vulnerability is identified as CVE-2026-71206. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in go-shiori shiori (version unknown). It has been classified as critical. Affected is the function CheckToken of the file internal/domains/auth.go of the component Token Validation. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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. Deleting an account or demoting it from owner to a regular role has no effect on tokens already issued to that account — a deleted or demoted owner's token continues authenticating with its original owner-level privileges until natural expiry, which can be up to 30 days with 'remember me' enabled.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-71206 since 08/05/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/05/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-53203). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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• go-shiori

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• shiori

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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