4.3
Medium
CVE-2026-86853 A malicious webpage could repeatedly trigger external URL schemes, causing system prompts or external application…
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox for iOS 155.1 | earliest → < 155.1 | 155.1 |
Other CVEs of Firefox for iOS
The 60 CVEs of Firefox for iOS →
CVE-2026-116631
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5.4
Medium
CVE-2026-116632
A malicious web page could insert arbitrary text into the FaceTime call prompt shown by iOS, potentialy allowing it to…
5.4
Medium
CVE-2026-103417
Firefox for iOS could autofill saved credentials into a new page if cross-origin navigation occurred while the…
5.5
Medium
CVE-2026-103418
Firefox for iOS directly interpolated the page’s HTML language attribute into translation JavaScript, allowing…
8.8
High