CVE-2026-7321

CRITICAL 9.6CVE-2026-7321 · Published 28/04/2026 · updated 26/10/2026

Package	Affected versions	Patched versions
firefox mozilla	`< 140.10.1< 150.0`	`140.10.1150.0`
thunderbird mozilla	`< 140.10.1< 150.0`	`140.10.1150.0`

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.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
mozilla.org/security/advisories/mfsa2026-30 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-33 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-36 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-39 · Vendor Advisory

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