---
id: CVE-2025-14861
title: Memory safety bugs present in Firefox 146
summary: >-
  Memory safety bugs present in Firefox 146. Some of these bugs showed evidence
  of memory corruption and we presume that with enough effort some of these
  could have been exploited to run arbitrary code. This vulnerability was fixed
  in Fire…
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 < 146.0.1
patched:
  - firefox 146.0.1
published: '2025-12-18'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T17:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14861'
references:
  - url: 'https://bugzilla.mozilla.org/buglist.cgi?bug_id=1996570%2C1999700'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-98/'
    label: security@mozilla.org
tags:
  - nvd
epss: 0.00254
epssPercentile: 0.15288
ingestedAt: '2026-09-30T17:13:20.769Z'
---

## Overview

Memory safety bugs present in Firefox 146. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 146.0.1.

## Affected

- `firefox < 146.0.1`

## Remediation

Upgrade past the affected range:

- `firefox 146.0.1`