What’s Vulnerable › Vulnerabilities

CVE-2026-6412: Continued acceptance of SHA-1/MD5 digests in certificate processing

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-06-27
• Weakness: CWE-327

Description

Certificate policy and RFC 8446 compliance concerns regarding the continued acceptance of SHA-1/MD5 in certificate processing.

Affected products

• wolfSSL: from 3.9.10 before 5.9.2 — fixed in 5.9.2

How to fix

Upgrade to a fixed version: wolfSSL 5.9.2. Check the vendor advisory for mitigations.

References

• https://github.com/wolfSSL/wolfssl/pull/10222
• https://www.wolfssl.com/docs/security-vulnerabilities/

Get alerted when CVE-2026-6412 or the next vulnerability affects your stack