CVE-2009-0642: Ruby-Lang Ruby

Medium severity, CVSS 6.8. EPSS: 2.6% chance of exploitation in the next 30 days.

ext/openssl/ossl_ocsp.c in Ruby 1.8 and 1.9 does not properly check the return value from the OCSP_basic_verify function, which might allow remote attackers to successfully present an invalid X.509 certificate, possibly involving a revoked certificate.

Affected products

• Ruby-Lang Ruby: version 1.8 only; version 1.9 only

Published 2009-02-20. Last modified 2026-06-16.