VDB
CVE-2026-6785
CVE-2026-6785
PUBLISHED
CVSS 8.1 HIGH
Reported by mozilla · Published April 21, 2026
Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Risk Scores
CVSS v3.1
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 115.35, 140.10, 150 |
| Mozilla | Thunderbird | 140.10, 150 |
| Mozilla | Thunderbird | 140.10, 150 |
| Mozilla | Firefox | 115.35, 140.10, 150 |
Timeline
- Apr 21, 2026 CVE Published
- Apr 22, 2026 EPSS Score
- Apr 27, 2026 Distribution Patch
- Apr 27, 2026 Security Advisory
- Apr 27, 2026 Distribution Patch
- Apr 27, 2026 Security Advisory
- Apr 27, 2026 Distribution Patch
- Apr 27, 2026 Security Advisory
- Apr 28, 2026 Distribution Patch
- Apr 28, 2026 Security Advisory
- Apr 28, 2026 Distribution Patch
- Apr 30, 2026 Distribution Patch