VULNERABILITY INTELLIGENCE
CVE-2026-53776
CVSS score9.1 CRITICAL
EPSS probability0.36%
CISA KEVNot currently listed
Published2026-06-16
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Description
Perry before 0.5.1166 contains a JWT validation vulnerability that allows remote attackers to bypass token expiration by exploiting the unconditional setting of validate_exp = false in the verify_decode helper within the stdlib JWT verification path. Attackers in possession of a previously issued bearer token can present expired tokens to any jwt.verify() call and retain authenticated access indefinitely, bypassing force-expired sessions such as user logout or administrative revocation.
Weakness classification
- disclosure@vulncheck.com: CWE-613