CVE-2026-28802

CRITICAL
2026-03-06 [email protected] GHSA-7wc2-qxgw-g8gg
9.8
CVSS 3.1
Share

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
PoC Detected
Mar 09, 2026 - 21:20 vuln.today
Public exploit code
Patch Released
Mar 09, 2026 - 21:20 nvd
Patch available
CVE Published
Mar 06, 2026 - 07:16 nvd
CRITICAL 9.8

Tags

Python Authlib

Description

Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature verification step without any changes to the application code when a failure was expected.. This issue has been patched in version 1.6.7.

Analysis

JWT verification bypass in Authlib 1.6.5-1.6.6. PoC and patch available.

Sign in for full analysis, threat intelligence, and remediation guidance.

Remediation

Within 24 hours: Inventory all systems using Authlib and assess exposure scope; activate incident response protocols and prepare communications. Within 7 days: Upgrade Authlib to version 1.7.0 or later across all production and non-production environments. …

Sign in for detailed remediation steps.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Priority Score

69
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +49
POC: +20

Share

CVE-2026-28802 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy