CVE-2026-7321
Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component
CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
11th
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.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 28, 2026 |
| Last Updated | Apr 30, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2029461 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-30/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-33/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-36/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-39/
Credits
The Mozilla Fuzzing Team