---
id: CVE-2026-92051
title: Spoofing issue due to invalid pointer in the Graphics component
summary: >-
  Spoofing issue due to invalid pointer in the Graphics component. This
  vulnerability was fixed in Firefox 156 and Thunderbird 156.
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-476
vendor: Mozilla
product: Firefox
affected:
  - Firefox
  - Thunderbird
published: '2026-09-15'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T18:17:13.710'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92051'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=2061393'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-90/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-94/'
    label: security@mozilla.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-21T17:42:44.837250Z'
epss: 0.00307
epssPercentile: 0.23708
ingestedAt: '2026-09-15T12:36:50.182Z'
---

## Overview

Spoofing issue due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.