CVE-2026-100767
⚠️ highSummary
Use-after-free in the Networking: Cache 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
8.8
High
EPSS Score
0.3
Exploit Probability
Published Date
2026-09-29
First Seen: 2026-10-03
📊 Relative Risk Intelligence
This CVE is High Risk - more severe than 80.8% of all 365,890 vulnerabilities in our database.
#70,115
Top 25% 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:U/C:H/I:H/A:H
CWE IDs (Weakness Types)