CVE-2025-11708: Mozilla Firefox · Vulnerability
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited · CVSS 9.8 Critical : upgrade to 144 as a priority.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 144
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 14 Oct 2025
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: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Upgrade Mozilla Firefox to 144.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Mozilla Firefox | Affected
| Fixed in
|
AI-suggested
An official fix is available and has been released by Mozilla. Users and administrators should update to Firefox 144, Firefox ESR 140.4, Thunderbird 144, or Thunderbird 140.4 or later to remediate this vulnerability. No additional mitigation steps are required beyond applying the official patches.
Description
Use-after-free in MediaTrackGraphImpl::GetInstance(). This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
References
- bugzilla.mozilla.org/show_bug.cgi?id=1988931 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-81/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-83/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-84/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-85/ (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00031.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00015.html (opens in a new tab)