Improper Certificate Validation in wolfSSL - CVE-2026-55960
Published: July 1, 2026
Vulnerability identifier: #VU136631
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-55960
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: wolfSSL
Affected software:
wolfSSL
wolfSSL
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass certificate chain validation.
The vulnerability exists due to improper certificate validation in ParseCertRelative() when handling a raw public key that was not negotiated. A remote attacker can present an un-negotiated raw public key to bypass certificate chain validation.
Only builds with Raw Public Key support enabled are affected.
How to mitigate CVE-2026-55960
Install security update from vendor's website.