---
id: CVE-2026-117902
title: 'Use-after-free in the Layout: Text and Fonts component'
summary: >-
  Use-after-free in the Layout: Text and Fonts component. This vulnerability was
  fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird
  153.6.
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L'
cvssSource: adp
vendor: Mozilla
product: Firefox
affected:
  - Firefox
  - Thunderbird
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-04T19:43:59.020947Z'
published: '2026-10-27'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T19:44:07.261Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-117902'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=2079057'
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-118/'
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-120/'
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-121/'
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-122/'
tags:
  - cve.org
epss: 0.00181
epssPercentile: 0.07792
ingestedAt: '2026-10-27T16:11:59.378Z'
---

## Overview

Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

## Affected

- `Firefox`
- `Thunderbird`

## Remediation

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