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.
Published: 2026-06-16
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 16 Jun 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Perryts
Perryts perry
Vendors & Products Perryts
Perryts perry

Tue, 16 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 16 Jun 2026 16:45:00 +0000

Type Values Removed Values Added
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.
Title Perry < 0.5.1166 JWT Expiration Bypass via verify_decode
Weaknesses CWE-613
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 9.3, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-06-16T17:10:04.656Z

Reserved: 2026-06-10T20:14:32.825Z

Link: CVE-2026-53776

cve-icon Vulnrichment

Updated: 2026-06-16T17:09:31.535Z

cve-icon NVD

Status : Deferred

Published: 2026-06-16T17:16:42.620

Modified: 2026-06-16T17:36:59.703

Link: CVE-2026-53776

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-17T21:45:02Z

Weaknesses