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

VendorProductVersions
Debian:12firefox-esr*, 128.3.0esr-2, 128.3.0esr-1~deb12u1
Debian:13thunderbird140.9.0, 140.9.0, 140.8.0
Debian:11thunderbird115.5.0-1, 115.5.1-1, 115.5.2-1
Debian:14firefox-esr140.5.0esr-1~deb13u1, 140.5.0esr-1~deb12u1, 140.5.0esr-1~deb11u1
Debian:13firefox-esr140.3.0esr-1~deb12u1, 0, 128.13.0
Debian:12thunderbird1:115.9.0-1~deb12u1, 1:116.0~b7-1, 1:117.0~b5-1
Debian:14thunderbird1:132.0~b6-1, 0, 1:128.13.0esr-1
Debian:11firefox-esr128.6.0, 128.6.0, 128.7.0

Exploit Intelligence

Timeline

  • Mar 24, 2026 CVE Published
  • Apr 28, 2026 CVE Updated
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