PT-2026-2643 · Mozilla · Firefox

Andrew Mccreight · Published 2026-01-13 · Updated 2026-03-10 · CVE-2026-0881

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 147

Description A sandbox escape exists within the Messaging System component. This allows for a potential security compromise.

Recommendations Update Firefox to version 147 or later.

Fix

Improper Access Control

Protection Mechanism Failure

Weakness Enumeration

CWE-284

CWE-693

Related Identifiers

BDU:2026-01955

CVE-2026-0881

OPENSUSE-SU-2026:10046-1

Affected Products

Firefox

References · 35

• https://osv.dev/vulnerability/CVE-2026-0881 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-01/#CVE-2026-0881 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-04 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0881 · Security Note
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2026-0518SE47 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-0881 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-04 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10046-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-0881 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-01 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01955 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-0881 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0881 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/728014 · Security Note
• https://wiki.astralinux.ru/astra-linux-se18-bulletin-2026-0423SE18MD · Vendor Advisory