CVE-2026-10098: wolfSSL

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

OCSP CertID serial-number length-confusion in wolfSSL_OCSP_resp_find_status allows a same-issuer SingleResponse whose serial is a prefix of the target serial to be reported as the revocation status of a different certificate. The lookup compared serial-number bytes without first requiring the two serial numbers to be of equal length, so a SingleResponse for one certificate (same issuer) whose serial is a prefix of the target's serial would match, returning the wrong certificate's status. The fix requires the serial lengths to be equal before comparing the serial bytes.

Affected products

• wolfSSL wolfSSL: from 4.6.0, before 5.9.2 (fixed in 5.9.2)

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