Firefox bug CVE-2026-6770 enabled cross-site tracking and Tor fingerprinting

April 27, 2026 Yanac

CVE-2026-6770 let attackers fingerprint Firefox and Tor users, even in Private mode. Firefox 150 and Tor Browser 15.0.10 fixed it. A vulnerability, tracked as CVE-2026-6770, allowed attackers to fingerprint Firefox users, even in Private Browsing, and also impacted the Tor Browser. The flaw worked even when Tor’s New Identity feature was used, bypassing protections meantSecurity AffairsRead More