Description
Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9Attack Vector: Network
Complexity: Low
Privileges: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High
Affected Packages4 packages
🔴Vulnerability Details
3CVEListUse-after-free in the Widget: Cocoa component↗2026-03-24 GHSAGHSA-9979-85jw-xp9m: Use-after-free in the Widget: Cocoa component↗2026-03-24 OSVCVE-2026-4711: Use-after-free in the Widget: Cocoa component↗2026-03-24 📋Vendor Advisories
6Red Hatfirefox: thunderbird: Use-after-free in the Widget: Cocoa component↗2026-03-24 DebianCVE-2026-4711: firefox - Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefo...↗2026 MozillaMozilla Foundation Security Advisory 2026-23: CVE-2026-4711↗ MozillaMozilla Foundation Security Advisory 2026-22: CVE-2026-4711↗ MozillaMozilla Foundation Security Advisory 2026-24: CVE-2026-4711↗ 🕵️Threat Intelligence
1WizCVE-2026-4711 Impact, Exploitability, and Mitigation Steps | Wiz↗ 💬Community
1BugzillaCVE-2026-4711 firefox: thunderbird: Use-after-free in the Widget: Cocoa component↗2026-03-24