PT-2026-35735 · Mozilla · Firefox

Bugmon · Published 2026-04-28 · Updated 2026-04-28 · CVE-2026-7321

NVD

CVSS v3.1

9.6

Critical

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

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox ESR 140.10.1.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2026-7321

Affected Products

Firefox

References · 3

• https://mozilla.org/security/advisories/mfsa2026-36 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-7321 · Security Note
• https://bugzilla.mozilla.org/show_bug.cgi?id=2029461 · Note