What is CVE-2026-6412?

CVE-2026-6412 is a medium-severity vulnerability in Wolfssl, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 4.3/10. Published 2026-06-25.

How severe is CVE-2026-6412?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Wolfssl

CVE-2026-6412

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

Vulnerability class: POODLE (CVE-2014-3566)

Published 2026-06-25 · last modified 2026-06-27.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Wolfssl — versions 3.9.10

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

github.com/wolfSSL/wolfssl/pull/10222 (Patch, patch, Issue Tracking)
www.wolfssl.com/docs/security-vulnerabilities/ (Vendor Advisory)

Frequently asked questions

What is CVE-2026-6412?: CVE-2026-6412 is a medium-severity vulnerability in Wolfssl, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 4.3/10. Published 2026-06-25.
How severe is CVE-2026-6412?: Medium severity. CVSS v3 base score is 4.3 out of 10.