{"id":"CVE-2026-71206","published":"2026-08-05T08:16:42.587","lastModified":"2026-08-10T12:17:24.367","description":"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.","cvssScore":8.3,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","cwes":["CWE-613"],"vendors":[],"products":[],"references":[{"url":"https://github.com/go-shiori/shiori","tags":[]}],"exploitRefs":[{"url":"https://github.com/go-shiori/shiori","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw lies in the CheckToken function, which does not re-fetch the account from the database even if the JWT's HMAC signature is valid. This can lead to unauthorized access to user accounts.","exploitability":"Exploitation is relatively easy if an attacker can manipulate the JWT. Precondition is access to the JWT or ability to intercept and modify it.","blast_radius":"If exploited, attackers could gain full access to user accounts, potentially leading to data breaches or unauthorized actions.","remediation":"Upgrade to the latest version of the software that includes the fix for this vulnerability, or implement a mechanism to re-fetch the account from the database after token validation.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","jwt","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-02T08:50:49.202Z"}}