CVE-2026-100770
⛔ criticalSummary
Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
CVSS Score
9.6
Critical
EPSS Score
0.3
Exploit Probability
Published Date
2026-09-29
First Seen: 2026-10-03
📊 Relative Risk Intelligence
This CVE is Very High Risk - more severe than 90.2% of all 365,890 vulnerabilities in our database.
#35,807
Top 10% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: Sep 29, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
Mozilla
SSVC data provided by
CISA
Last Modified
2026-10-06
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE IDs (Weakness Types)