CVE-2026-96760— Authlib library contains a signature‑verification bypass vulnerability
Quick assessment
Affected
Authlib Authlib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Authlib（v1.7.2 及以下版本）存在签名验证绕过漏洞。 方法在接收一个 JSON 序列化格式的 JWS（JSON Web Signature）对象时，会在未进行签名验证且未要求提供加密密钥的情况下，直接返回有效载荷（payload），并标记为验证成功。
Possible ATT&CK Techniques 2 AI
T1556 · Modify Authentication Process T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-96760
Vulnerability Information
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Vulnerability Title
Authlib library contains a signature‑verification bypass vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-96760
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Vendor Advisories for CVE-2026-96760 (1)
Other References for CVE-2026-96760 (1)
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V. Comments for CVE-2026-96760
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