CVE-2006-2787: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 2.8% chance of exploitation in the next 30 days.

EvalInSandbox in Mozilla Firefox and Thunderbird before 1.5.0.4 allows remote attackers to gain privileges via javascript that calls the valueOf method on objects that were created outside of the sandbox.

Affected products

• Mozilla Firefox: 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: 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; …

Published 2006-06-02. Last modified 2026-06-16.