CVE-2009-1234: Opera Browser

Medium severity, CVSS 4.3. EPSS: 6.5% chance of exploitation in the next 30 days.

Opera 9.64 allows remote attackers to cause a denial of service (application crash) via an XML document containing a long series of start-tags with no corresponding end-tags. NOTE: it was later reported that 9.52 is also affected.

Affected products

• Opera Opera Browser: version 9.52 only; version 9.64 only

Published 2009-04-02. Last modified 2026-06-16.