CVE-2007-5276: Opera Browser

Medium severity, CVSS 4.3. EPSS: 1.4% chance of exploitation in the next 30 days.

Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.

Affected products

• Opera Opera Browser: version 9.0 only

Published 2007-10-08. Last modified 2026-06-16.