---
id: CVE-2026-100764
title: >-
  Privilege escalation due to incorrect boundary conditions in the Graphics:
  WebGPU component
summary: >-
  Privilege escalation due to incorrect boundary conditions in the Graphics:
  WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox
  157.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-119
vendor: mozilla
product: firefox
affected:
  - firefox < 157.0.0
  - thunderbird < 157.0
patched:
  - firefox 157.0.0
  - thunderbird 157.0
published: '2026-09-29'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T18:30:47.470'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100764'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=2061290'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-101/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-97/'
    label: security@mozilla.org
tags:
  - nvd
  - cve.org
epss: 0.00231
epssPercentile: 0.13934
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-29T13:14:29.276718Z'
ingestedAt: '2026-09-29T13:34:31.655Z'
---

## Overview

Privilege escalation due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

## Affected

- `firefox < 157.0.0`
- `thunderbird < 157.0`

## Remediation

Upgrade past the affected range:

- `firefox 157.0.0`
- `thunderbird 157.0`