PT-2026-61917 · Mozilla · Firefox

Yaqoub Aldurayhim · CVE-2026-16405 · Published 2026-07-21 · Updated 2026-07-21

NVD

CVSS v3.1

7.5

High

Base vector

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

Information disclosure in the Networking: WebSockets component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2026-16405

Affected Products

Firefox

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-16405 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-68 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-70 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=2036591 · Note