CVE-2026-118027 is a vulnerability in Mozilla Firefox
Published on October 27, 2026
Frame poisoning in the Layout component
Frame poisoning in the Layout component. This vulnerability was fixed in Firefox ESR 115.44.
Vulnerability Analysis
CVE-2026-118027 can be exploited 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 no impact on confidentiality, a high impact on integrity and availability.
Weakness Type
User Interface (UI) Misrepresentation of Critical Information
The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks.
Products Associated with CVE-2026-118027
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Affected Versions
Mozilla Firefox:- Version 115.44, <= * is unaffected.