Vulnerability details
CVE-2026-7321
Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component
CVSS 3.1
9.6Critical
Official description
Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.6Critical | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
5
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Details
- Published
- 2026-04-28
- Last updated
- 2026-04-30
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.25%
Probability of exploitation in 30 days
17.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')