CVE-2026-6329: wolfSSL

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

PKCS#12 MAC verification uses an attacker-controlled comparison length, weakening the integrity check on the MAC and allowing a mismatched MAC to be accepted. The PKCS#12 verify path compared the locally computed HMAC against the MAC parsed from the PKCS#12 structure using a length taken directly from the attacker-supplied input, without first verifying that it equals the length of the digest actually produced by the configured algorithm. A truncated or zero-length stored MAC could therefore be accepted, defeating the integrity protection of the MAC.

Affected products

• wolfSSL wolfSSL: from 3.10.0, before 5.9.2 (fixed in 5.9.2)

Published 2026-06-25. Last modified 2026-06-27.