PT-2026-33946 · Mozilla · Thunderbird+1

Richard Belisle · CVE-2026-6760 · Published 2026-04-21 · Updated 2026-07-25

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 150 Thunderbird versions prior to 150

Description A mitigation bypass exists in the Networking: Cookies component.

Recommendations Update to version 150 for Firefox. Update to version 150 for Thunderbird.

Fix

Authentication Bypass Using an Alternate Path or Channel

Weakness Enumeration

CWE-288

Related Identifiers

CVE-2026-6760

OPENSUSE-SU-2026:10626-1

OPENSUSE-SU-2026:11373-1

Affected Products

Firefox

Thunderbird

References · 242

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-6760 · Security Note
• https://mozilla.org/en-US/security/advisories/mfsa2026-30 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-30 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-33 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:11373-1 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-33 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6760 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-30/#CVE-2026-6760 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-6760 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10626-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6760 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-6760 · Security Note
• https://suse.com/security/cve/CVE-2025-9187 · Note
• https://suse.com/security/cve/CVE-2026-8969 · Note
• https://suse.com/security/cve/CVE-2026-0881 · Note