CVE-2026-16405 - Vulnerability Details - OpenCVE

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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

No data.

No data.

No data.

No data.

References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2036591
https://www.mozilla.org/security/advisories/mfsa2026-68/
https://www.mozilla.org/security/advisories/mfsa2026-70/

History

Tue, 21 Jul 2026 20:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-200
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 21 Jul 2026 12:45:00 +0000

Type	Values Removed	Values Added
Description		Information disclosure in the Networking: WebSockets component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.
Title		Information disclosure in the Networking: WebSockets component
References		https://bugzilla.mozilla.org/show_bug.cgi?id=2036591 https://www.mozilla.org/security/advisories/mfsa2026-68/ https://www.mozilla.org/security/advisories/mfsa2026-70/

MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-07-21T12:38:17.436Z

Updated: 2026-07-21T19:25:29.180Z

Reserved: 2026-07-20T21:57:42.043Z

Link: CVE-2026-16405

Vulnrichment

Updated: 2026-07-21T19:24:41.997Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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