Vulnerability Monitor

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CVE-2025-11934

Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously could respond as ECDSA P256 being the accepted signature algorithm and the connection would continue with using ECDSA P256, if the client supports ECDSA P256.

Published

2025-11-21T23:15:44.540

Last Modified

2025-12-03T18:47:17.287

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 2.7 (LOW)

Weaknesses
  • Type: Secondary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application wolfssl wolfssl < 5.8.4 Yes
Operating System apple macos - No
Operating System linux linux_kernel - No
References