CVE-2026-7321

Weakness

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.

Affected products

• mozilla firefox
• mozilla thunderbird

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2029461
• https://www.mozilla.org/security/advisories/mfsa2026-30/
• https://www.mozilla.org/security/advisories/mfsa2026-33/
• https://www.mozilla.org/security/advisories/mfsa2026-36/
• https://www.mozilla.org/security/advisories/mfsa2026-39/