---
id: "CVE-2024-9680"
kind: "vulnerability"
aliases: ["CVE-2024-9680"]
title: "An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation\u2026"
severity: "critical"
cvss: 9.8
epss: null
exploited: true
status: "open"
category: "runtime"
products: [{"name": "mozilla firefox", "fixed": ["115.16.1"], "affected": "< 115.16.1", "ecosystem": "vendor"}, {"name": "mozilla firefox", "fixed": ["131.0.2"], "affected": "< 131.0.2", "ecosystem": "vendor"}, {"name": "mozilla firefox", "fixed": ["128.3.1"], "affected": ">= 128.1.0, < 128.3.1", "ecosystem": "vendor"}, {"name": "mozilla thunderbird", "fixed": ["115.16.0"], "affected": "< 115.16.0", "ecosystem": "vendor"}, {"name": "mozilla thunderbird", "fixed": ["128.3.1"], "affected": ">= 128.0.1, < 128.3.1", "ecosystem": "vendor"}, {"name": "mozilla thunderbird", "fixed": [], "affected": "= 131.0", "ecosystem": "vendor"}, {"name": "debian linux", "fixed": [], "affected": "= 11.0", "ecosystem": "vendor"}, {"name": "Mozilla Firefox", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browser", "desktop", "exploited", "firefox", "firefox-esr", "ransomware", "runtime"]
not_affected_if: ["unknown"]
published_at: "2024-10-09T13:15:12+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-24T00:09:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-9680", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-9680", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation…

Firefox and Firefox ESR have a use-after-free bug in animation timelines that lets a crafted web page run code inside the content process. CISA lists it as actively exploited in the wild, and the KEV entry notes ransomware use.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:mozilla firefox affected < 115.16.1 fixed 115.16.1
- vendor:mozilla firefox affected < 131.0.2 fixed 131.0.2
- vendor:mozilla firefox affected >= 128.1.0, < 128.3.1 fixed 128.3.1
- vendor:mozilla thunderbird affected < 115.16.0 fixed 115.16.0
- vendor:mozilla thunderbird affected >= 128.0.1, < 128.3.1 fixed 128.3.1
- vendor:mozilla thunderbird affected = 131.0 fixed ?
- vendor:debian linux affected = 11.0 fixed ?
- vendor:Mozilla Firefox affected ? fixed ?

## How to check

Check the Firefox version under Help > About Firefox and compare it with the fixed release in the Mozilla advisory; the sources do not name a fixed version.

## Fix

Update Firefox and Firefox ESR to the latest release; the sources do not name the fixed version.
If an update is not possible, follow the vendor mitigations or stop using the product, as CISA requires.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-9680
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2024-9680

## From the sources

An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.

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