VDB
DEBIAN-CVE-2026-4700
DEBIAN-CVE-2026-4700
PUBLISHED
CVSS 9.800000190734863 CRITICAL
Mitigation bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Risk Scores
CVSS 3.1
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:12 | firefox-esr | *, 128.3.0esr-2, 128.3.0esr-1~deb12u1 |
| Debian:13 | thunderbird | 140.9.0, 140.9.0, 140.8.0 |
| Debian:11 | thunderbird | 115.5.0-1, 115.5.1-1, 115.5.2-1 |
| Debian:14 | firefox-esr | 140.5.0esr-1~deb13u1, 140.5.0esr-1~deb12u1, 140.5.0esr-1~deb11u1 |
| Debian:13 | firefox-esr | 140.3.0esr-1~deb12u1, 0, 128.13.0 |
| Debian:12 | thunderbird | 1:115.9.0-1~deb12u1, 1:116.0~b7-1, 1:117.0~b5-1 |
| Debian:14 | thunderbird | 1:132.0~b6-1, 0, 1:128.13.0esr-1 |
| Debian:11 | firefox-esr | 128.6.0, 128.6.0, 128.7.0 |
Exploit Intelligence
- mfsa2026-23.yml (github-poc)
- 2026.xml (github-poc)
- _18a_browser_cves_data.py (github-poc)
Timeline
- Mar 24, 2026 CVE Published
- Apr 28, 2026 CVE Updated