CVE-2026-2919 Attacker-controlled content shown under spoofed domains in Focus for iOS via stalled navigation and iframe redirect

What is CVE-2026-2919?

CVE-2026-2919 is a medium-severity vulnerability in Mozilla Focus for iOS, published on 9 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Malicious scripts could display attacker-controlled web content under spoofed domains in Focus for iOS by stalling a _self navigation to an invalid port and triggering an iframe redirect, causing the UI to display a trusted domain without user interaction. This vulnerability was fixed in Focus for iOS 148.2.

Weakness: CWE-451

Which versions are affected by CVE-2026-2919?

It affects 1 product.

Products include Mozilla Firefox Focus.

How do I fix CVE-2026-2919?

No fix has been published for CVE-2026-2919 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-2919 being exploited?

There is no known exploitation of CVE-2026-2919 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Focus for iOS

• CVE-2024-10474 Security feature bypass in Focus for iOS Critical 9.1
• CVE-2023-29534 Security feature bypass in Firefox for Android Critical 9.1
• CVE-2024-1563 Race condition in Focus for iOS High 8.1
• CVE-2024-0605 Race condition in Focus for iOS High 7.5
• CVE-2023-25743 Security feature bypass in Firefox High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c64m-p38j-gxh3.