Privilege Escalation in Firefox's Panning and Zooming Component
CVE-2026-109743

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
13 October 2026

What is CVE-2026-109743?

A vulnerability exists in the Panning and Zooming component of Firefox that allows for privilege escalation, potentially enabling an attacker to gain greater access than intended. This issue highlights the importance of maintaining updated software versions. Mozilla has addressed this vulnerability in Firefox version 158 and Firefox ESR version 153.5, ensuring enhanced security and user protection.

Affected Version(s)

Firefox 153.5

Firefox 158

Thunderbird 153.5

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2059195
https://www.mozilla.org/security/advisories/mfsa2026-106/
https://www.mozilla.org/security/advisories/mfsa2026-108/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mozilla
.