How severe is CVE-2026-2919?

CVE-2026-2919 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-2919 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2919?

CVE-2026-2919 affects Mozilla Firefox Focus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2919?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-2919 have an EU (EUVD) identifier?

Yes. CVE-2026-2919 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10338.

When was CVE-2026-2919 published?

CVE-2026-2919 was published on 2026-03-09 and last updated on 2026-06-17.

CVE-2026-2919

CVE-2026-2919 is a medium-severity vulnerability in Mozilla Firefox Focus with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-451.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10338
Weakness: CWE-451
Affected product: Mozilla Firefox Focus
Published: 2026-03-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-2919?: 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.
How severe is CVE-2026-2919?: CVE-2026-2919 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-2919 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2919?: CVE-2026-2919 affects Mozilla Firefox Focus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2919?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2919 have an EU (EUVD) identifier?: Yes. CVE-2026-2919 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10338.
When was CVE-2026-2919 published?: CVE-2026-2919 was published on 2026-03-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:iphone_os:*:*

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