---
id: CVE-2026-96760
title: >-
  Authlib (v1.7.2 and below) contains a signature verification bypass
  vulnerability
summary: >-
  Authlib (v1.7.2 and below) contains a signature verification bypass
  vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON
  Serialization JWS object and returns the payload as successfully verified
  without checking f…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-20
  - CWE-347
  - CWE-358
  - CWE-670
vendor: Authlib
product: Authlib
affected:
  - Authlib 1.7.2
published: '2026-09-28'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T14:17:32.147'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96760'
references:
  - url: 'https://github.com/authlib/authlib'
    label: cret@cert.org
  - url: 'https://kb.cert.org/vuls/id/762428'
    label: cret@cert.org
  - url: 'https://www.kb.cert.org/vuls/id/762428'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96760.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-96760'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2542633'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-96760'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96760'
  - url: 'https://access.redhat.com/errata/RHSA-2026:79378'
  - url: 'https://github.com/authlib/authlib/security/advisories/GHSA-6v38-4h7w-rj9h'
  - url: 'https://github.com/authlib/authlib/pull/938'
  - url: >-
      https://github.com/authlib/authlib/commit/6c11a02da8730914cea08ec195f1108a40dc6733
  - url: 'https://github.com/authlib/authlib/releases/tag/v1.9.0'
  - url: 'https://github.com/advisories/GHSA-6v38-4h7w-rj9h'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
  - ghsa
  - pip
  - osv
  - score-dispute
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-01T13:57:45.534196Z'
epss: 0.00383
epssPercentile: 0.32199
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/uziii2208/CVE-2026-96760'
  checkedAt: '2026-10-27T19:24:31.044Z'
exploitAvailable: true
scores:
  nvd: 9.8
  vendor: 7.5
  ghsa: 9.1
  osv: 9.1
ingestedAt: '2026-09-28T20:20:05.662Z'
patched:
  - ansible_automation_platform 2.7
aliases:
  - GHSA-6v38-4h7w-rj9h
ecosystem: pip
---

## Overview

Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Exploit Intelligence, Lightspeed Core, Migration Toolkit for Applications 8, OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux command line assistant, … · no fix planned: Exploit Intelligence, Lightspeed Core, Migration Toolkit for Applications 8, OpenShift Lightspeed, … · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96760.json)
- **RHSA-2026:79378** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.7 · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:79378)

## Package advisory (CVE-2026-96760)

Affected packages:

- `authlib <= 1.8.0`

Patched in:

- `authlib 1.9.0`

Source: https://github.com/advisories/GHSA-6v38-4h7w-rj9h