VDB
DEBIAN-CVE-2026-4691
DEBIAN-CVE-2026-4691
PUBLISHED
CVSS 9.800000190734863 CRITICAL
Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Risk Scores
CVSS v3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | thunderbird | 0, 140.9.0, 140.9.0 |
| Debian:12 | thunderbird | *, *, * |
| Debian:13 | firefox-esr | 128.13.0esr-1, 140.9.0, 140.9.0 |
| Debian:12 | firefox-esr | 140.9.0, 0, 102.11.0esr-1 |
| Debian:11 | firefox-esr | 128.6.0esr-1, 128.6.0esr-1~deb11u1, 128.6.0esr-1~deb11u2 |
| Debian:11 | thunderbird | 130.0, 135.0-1, 136.0-1 |
| Debian:14 | firefox-esr | 128.13.0esr-1, 128.14.0esr-1, 128.14.0esr-1~deb13u1 |
| Debian:13 | thunderbird | 1:140.3.0esr-1, 1:140.2.0esr-1, * |
Timeline
- Mar 24, 2026 CVE Published
- Apr 28, 2026 CVE Updated