CVE-2025-49709 json
Memory corruption in canvas surfaces
published last yr. modified last mo. also EUVD-2025-18101
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 52%
- public exploits
- 0
- none known
Summary
Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.
Patch / fix
- mozilla firefox 139.0.4
- firefox-esr openSUSE Tumbleweed 153.0-1.1
- MozillaFirefox openSUSE Tumbleweed 139.0.4-1.1
opensuse advisories openSUSE-SU-2026:11373-1openSUSE-SU-2025:15203-1
Is CVE-2025-49709 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- last yr.
Exploit prediction
0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Mozilla Firefox
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
mozilla.org
/security/advisories/mfsa2025-47/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=1966083
permissions-required
Sources
- CVE List CVE-2025-49709
- NVD CVE-2025-49709
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.