CVE-2026-74937
⚠️ highSummary
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS Score
8.8
High
EPSS Score
0.3
Exploit Probability
Published Date
2026-08-18
First Seen: 2026-08-19
📊 Relative Risk Intelligence
This CVE is High Risk - more severe than 80.8% of all 348,756 vulnerabilities in our database.
#66,921
Top 25% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: Aug 18, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
Amy Burnett of OpenAI
SSVC data provided by
CISA
Last Modified
2026-08-19
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)