CVE-2024-9680: Mozilla Firefox · Use-after-free in Animation Timeline
Affects Mozilla FirefoxSource CVE Database V5
Exploited in the wild · used in ransomware campaigns · KEV due 5 Nov 2024 · 23% EPSS · fixed in 131.0.2 : patch Mozilla Firefox now.
Data as of 26 Oct 2026, 14:05 UTC
- KEV deadline
- US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
- Ransomware
- Used in ransomware campaigns
- EPSS
- 23.1% chance of exploitation in 30 days – higher than 97% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 131.0.2, 131.0.1, 128.3.1 +2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 9 Oct 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 6 days after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by Mozilla Corporation
, 7 hours before disclosure
CVE published
on cve.org
, t = 0
Added to CISA KEV (opens in a new tab)
exploitation confirmed · ransomware use known
, 6 days after disclosure
KEV remediation due
US federal deadline
, 27 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Mozilla Firefox | Affected
| Fixed in
|
Description
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.
References
- bugzilla.mozilla.org/show_bug.cgi?id=1923344 (opens in a new tab)
- msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-49039 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2024-51/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2024-52/ (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-9680 (opens in a new tab)
- bugs.freebsd.org/bugzilla/show_bug.cgi?id=281992 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2024/10/msg00005.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2024/10/msg00006.html (opens in a new tab)