CVE-2009-3044: Opera Browser

Medium severity, CVSS 5.0. EPSS: 1% chance of exploitation in the next 30 days.

Opera before 10.00 does not properly handle a (1) '\0' character or (2) invalid wildcard character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Affected products

• Opera Opera Browser: up to and including 10.00; version 1.00 only; version 2.00 only; version 2.10 only; version 2.12 only; version 3.00 only; …

Published 2009-09-02. Last modified 2026-06-16.