PT-2026-33962 · Mozilla · Firefox

Nan Wang · Published 2026-04-21 · Updated 2026-04-21 · CVE-2026-6776

Mitre

CVSS v3.1

7.8

High

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

Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2026-6776

Affected Products

Firefox

References · 4

• https://mozilla.org/security/advisories/mfsa2026-32 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6776 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-30 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=2021770 · Note