Use of a broken or risky cryptographic algorithm in wolfSSL - CVE-2026-6412
Published: July 1, 2026
Vulnerability identifier: #VU136655
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-6412
CWE-ID: CWE-327
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 use weak certificate signatures.
The vulnerability exists due to improper certificate validation in certificate processing when handling SHA-1 or MD5 signatures. A remote attacker can present certificates using weak signature algorithms to use weak certificate signatures.
How to mitigate CVE-2026-6412
Install security update from vendor's website.