9.6crit
CVE-2026-92071
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
Published 52 d ago · modified 32 d ago · JSON
CVSS
9.6
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
0.2%
percentile 15%
Public exploits
0
none known
Summary
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CISA SSVC assessment
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 45 d ago
Exploit prediction (EPSS)
0.24% probability of exploitation in the next 30 days, higher than 15% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected products
- Mozilla Firefox
- Mozilla Thunderbird
Classification
- Weakness
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- bugzilla.mozilla.org /show_bug.cgi?id=2061231
- mozilla.org /security/advisories/mfsa2026-90/
- mozilla.org /security/advisories/mfsa2026-93/
- mozilla.org /security/advisories/mfsa2026-94/
- mozilla.org /security/advisories/mfsa2026-96/
Sources
- CVE List: CVE-2026-92071
- NVD: CVE-2026-92071
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