CVE-2026-74980 in Firefox
Summary
by MITRE • 08/18/2026
Clickjacking issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.
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Analysis
by VulDB Data Team • 08/18/2026
The identified security flaw represents a classic clickjacking vulnerability within the Downloads management interface of Mozilla Firefox on the Android platform. Clickjacking, formally categorized under CWE-1021 as Improper Restriction of Rendered UI Layers or Frames, is an attack technique that tricks users into clicking on something different from what they perceive to be clicking. In this specific instance, the vulnerability stems from insufficient framing policies within the Downloads component. This allows malicious web pages to embed Firefox’s download interface inside a hidden or transparent iframe overlaying legitimate content. When a user interacts with their device, believing they are tapping on visible page elements such as buttons or links, their input is actually intercepted by the underlying Firefox UI layer. This misalignment between visual perception and actual interaction point creates an opportunity for unauthorized actions to be executed under the guise of normal browsing activity.
The operational impact of this vulnerability centers on the potential for user deception leading to unintended consequences. An attacker could craft a malicious webpage that loads the Firefox Downloads page in the background while displaying deceptive content in the foreground. Because Android applications often have elevated privileges compared to standard web pages, successful exploitation could allow an attacker to trigger download actions, clear browsing history, or access sensitive file management features without explicit user consent for those specific operations. While clickjacking is generally considered a lower-severity issue than remote code execution, it poses significant risks in the context of mobile browsers where users may be less vigilant about UI manipulation and where downloaded files can contain malware or lead to further exploitation chains if opened automatically by other applications on the device.
From an attack vector perspective, this vulnerability aligns with MITRE ATT&CK technique T1071 Application Layer Protocol: Web Protocols, specifically within the context of user interaction deception. The attacker relies on social engineering principles combined with technical UI manipulation to bypass standard security boundaries that protect against direct code injection or data theft. The success of such an attack depends heavily on the victim's trust in the visible interface and their lack of awareness regarding background processes running by the browser application.
To mitigate this risk, Mozilla addressed the issue in Firefox version 154 for Android by implementing stricter frame-busting scripts and enforcing Content Security Policy headers that prevent the Downloads component from being rendered within iframes on external domains. This technical fix ensures that any attempt to load the vulnerable UI layer inside a malicious container is blocked by the browser engine itself. Users are advised to update their Firefox application immediately to version 154 or later to ensure these protections are active. Additionally, maintaining up-to-date security patches for mobile browsers remains critical as new variations of clickjacking techniques continue to emerge targeting various components of modern web applications.