VDB
DEBIAN-CVE-2026-6786
DEBIAN-CVE-2026-6786
PUBLISHED
CVSS 8.100000381469727 HIGH
Memory safety bugs present in 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 140.10, Thunderbird 150, and Thunderbird 140.10.
Risk Scores
CVSS 3.1
8.100000381469727
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | thunderbird | 140.5.0, 140.6.0, 140.6.0 |
| Debian:13 | firefox-esr | 140.7.0esr-1, 0, 128.14.0esr-1 |
| Debian:13 | thunderbird | 140.10.0, 140.10.0, 140.2.0 |
| Debian:14 | firefox-esr | 140.6.0esr-1, 140.5.0esr-1~deb13u1, 140.5.0esr-1~deb12u1 |
| Debian:11 | thunderbird | 128.11.0, 1:102.0.1-1, * |
| Debian:14 | thunderbird | 140.7.0, 140.9.1, 140.9.1 |
| Debian:12 | firefox-esr | 102.11.0esr-1, 102.12.0esr-1, 102.12.0esr-1~deb10u1 |
| Debian:11 | firefox-esr | 140.8.0, 140.8.0, 140.9.0 |
Exploit Intelligence
- FreeBSD-2026-0164.json (github-poc)
- mfsa2026-30.yml (github-poc)
- mfsa2026-34.yml (github-poc)
- 2026-04-29_417_firefox-esr.yaml (github-poc)
- 2026.xml (github-poc)
Timeline
- Apr 26, 2026 CVE Published
- Apr 28, 2026 CVE Updated