CVE-2026-124909 is a vulnerability in Mozilla Firefox
Published on November 10, 2026
Information disclosure in the Private Browsing component
Information disclosure in the Private Browsing component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
Vulnerability Analysis
CVE-2026-124909 can be exploited with network access, requires 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 small impact on confidentiality, a small 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-2026-124909 has been classified to as an Information Disclosure vulnerability or weakness.
Products Associated with CVE-2026-124909
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Affected Versions
Mozilla Firefox:- Version 153.7, <= 153.* is unaffected.
- Version 160, <= * is unaffected.