CVE-2025-6427

Name of the Vulnerable Software and Affected Versions: Firefox versions prior to 140

Description: An attacker was able to bypass the connect-src directive of a Content Security Policy by manipulating subdocuments, which would have also hidden the connections from the Network tab in Devtools.

Recommendations: For versions prior to 140, update to version 140 or later to resolve the issue. As a temporary workaround, consider restricting the use of subdocuments to minimize the risk of exploitation.