PT-2026-27420 · Mozilla · Firefox+1

Nika Layzell · Published 2026-03-24 · Updated 2026-03-29 · CVE-2026-4722

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Thunderbird versions prior to 149

Description A privilege escalation issue exists in the Inter-Process Communication (IPC) component. This allows for potential unauthorized access and control within the system.

Recommendations Update Firefox to version 149 or later. Update Thunderbird to version 149 or later.

Fix

Related Identifiers

CVE-2026-4722

OPENSUSE-SU-2026:10458-1

Affected Products

Firefox

Thunderbird

References · 63

• https://mozilla.org/en-US/security/advisories/mfsa2026-23 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-23 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4722 · Security Note
• https://ubuntu.com/security/CVE-2026-4722 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-20 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10458-1 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-20/#CVE-2026-4722 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4722 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4722 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-4722 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/730267 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-20 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-4714 · Note
• https://suse.com/security/cve/CVE-2026-4700 · Note
• https://suse.com/security/cve/CVE-2026-4728 · Note