Description
A malicious webpage could repeatedly trigger external URL schemes, causing system prompts or external application launches. This could make Firefox for iOS temporarily unusable until the page is closed. This vulnerability was fixed in Firefox for iOS 155.1.
Affected products
mozilla: firefox mobile
References2
- www.mozilla.org/security/advisories/mfsa2026-89/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=1847631 Permissions Required
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - EPSS — exploit probability
- 0% percentile: 20 · as of 3 November 2026
- CWE
- CWE-451
Could this be exploited in your environment?
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