CVE-2026-7321

CRITICAL

9.6

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.

CVE Details

CVSS v3.1 Score9.6

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published4/28/2026

Last Modified5/1/2026

Sourcenvd

Honeypot Sightings0

Affected Products

mozilla:firefoxmozilla:thunderbird

Weaknesses (CWE)

CWE-120

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2029461(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-30/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-33/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-36/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-39/(security@mozilla.org)

IOC Correlations

No correlations recorded

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