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

VendorProductVersions
Debian:14thunderbird0, 140.9.0, 140.9.0
Debian:12thunderbird*, *, *
Debian:13firefox-esr128.13.0esr-1, 140.9.0, 140.9.0
Debian:12firefox-esr140.9.0, 0, 102.11.0esr-1
Debian:11firefox-esr128.6.0esr-1, 128.6.0esr-1~deb11u1, 128.6.0esr-1~deb11u2
Debian:11thunderbird130.0, 135.0-1, 136.0-1
Debian:14firefox-esr128.13.0esr-1, 128.14.0esr-1, 128.14.0esr-1~deb13u1
Debian:13thunderbird1:140.3.0esr-1, 1:140.2.0esr-1, *

Timeline

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