CVE Watchtower ← Back to CVE ListCVE-2026-74934NVDVulnerability SummarySite isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.Severity LevelUNKNOWNPublished DateAug 18, 2026Last ModifiedAug 18, 2026Exploitation StatusNo confirmed exploitation yetEPSS Score (30-Day)Data PendingRoot Weakness (CWE)N/AExternal Referenceshttps://bugzilla.mozilla.org/show_bug.cgi?id=2050584https://www.mozilla.org/security/advisories/mfsa2026-74/https://www.mozilla.org/security/advisories/mfsa2026-75/https://www.mozilla.org/security/advisories/mfsa2026-76/https://www.mozilla.org/security/advisories/mfsa2026-77/