Firefox DOM Security Component Info Disclosure (CVE-2026-16400)
CVE-2026-16400 Published on July 21, 2026
Information disclosure in the DOM: Security component
Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
Vulnerability Analysis
CVE-2026-16400 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Information Disclosure Vulnerability?
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVE-2026-16400 has been classified to as an Information Disclosure vulnerability or weakness.
Products Associated with CVE-2026-16400
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Affected Versions
Mozilla Firefox:- Version 153, <= * is unaffected.
- Version 153, <= * is unaffected.