CVE-2026-74934
⚠️ highSummary
Site isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
CVSS Score
7.5
High
EPSS Score
0.2
Exploit Probability
Published Date
2026-08-18
First Seen: 2026-08-19
📊 Relative Risk Intelligence
This CVE is Moderate Risk - more severe than 68.0% of all 349,016 vulnerabilities in our database.
#111,749
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Aug 21, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
satyamasd
SSVC data provided by
CISA
Last Modified
2026-08-24
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H