CVE-2011-2986: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 1.2% chance of exploitation in the next 30 days.

Mozilla Firefox 4.x through 5, Thunderbird before 6, SeaMonkey 2.x before 2.3, and possibly other products, when the Direct2D (aka D2D) API is used on Windows, allows remote attackers to bypass the Same Origin Policy, and obtain sensitive image data from a different domain, by inserting this data into a canvas.

Affected products

• Mozilla Firefox: version 4.0 only; version 4.0.1 only; version 5.0 only
• Mozilla Seamonkey: version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; version 1.0.5 only; …
• Mozilla Thunderbird: up to and including 5.0; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2011-08-18. Last modified 2026-06-16.