---
id: CVE-2024-5700
title: >-
  Memory safety bugs present in Firefox 126, Firefox ESR 115.11, and Thunderbird
  115.11
summary: >-
  Memory safety bugs present in Firefox 126, Firefox ESR 115.11, and Thunderbird
  115.11. 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
  arbitrar…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-786
  - CWE-788
vendor: mozilla
product: firefox
affected:
  - firefox < 115.12
  - firefox < 127.0
  - thunderbird < 115.12
patched:
  - firefox 127.0
  - thunderbird 115.12
published: '2024-06-11'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T22:17:28.513'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-5700'
references:
  - url: >-
      https://bugzilla.mozilla.org/buglist.cgi?bug_id=1862809%2C1889355%2C1893388%2C1895123
    label: security@mozilla.org
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00000.html'
    label: security@mozilla.org
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00010.html'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2024-25/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2024-26/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2024-28/'
    label: security@mozilla.org
  - url: >-
      https://bugzilla.mozilla.org/buglist.cgi?bug_id=1862809%2C1889355%2C1893388%2C1895123
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00000.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00010.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.mozilla.org/security/advisories/mfsa2024-25/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.mozilla.org/security/advisories/mfsa2024-26/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.mozilla.org/security/advisories/mfsa2024-28/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2024-06-14T03:55:43.225601Z'
epss: 0.0044
epssPercentile: 0.38346
ingestedAt: '2026-11-05T06:38:03.566Z'
---

## Overview

Memory safety bugs present in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11. 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 affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

## Affected

- `firefox < 115.12`
- `firefox < 127.0`
- `thunderbird < 115.12`

## Remediation

Upgrade past the affected range:

- `firefox 127.0`
- `thunderbird 115.12`