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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-53776 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  VulnCheck
CVSS-B 9.3 CRITICAL
Vector:  CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/PerryTS/perry/releases/v0.5.1166 VulnCheck
https://github.com/PerryTS/perry/security/advisories/GHSA-5324-c68v-8w62 VulnCheck
https://www.vulncheck.com/advisories/perry-jwt-expiration-bypass-via-verify-decode VulnCheck

Weakness Enumeration

CWE-ID CWE Name Source
CWE-613 Insufficient Session Expiration VulnCheck  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-53776
NVD Published Date:
06/16/2026
NVD Last Modified:
06/17/2026
Source:
VulnCheck