CVE-2026-116631

External protocol handler (tel:) address bar spoof

State: Published
Severity: 5.4 Medium
Published: Oct 26, 2026
Updated: Oct 26, 2026
Reserved: Oct 26, 2026

Description

A malicious web page could open a tel link in a window that was showing a different website, causing the phone-call prompt to appear as if that site had requested the call. This vulnerability was fixed in Firefox for iOS 156.1.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L	CISA-ADP

Weaknesses

CWE-451 User Interface (UI) Misrepresentation of Critical Information

Affected Products

Product	Versions
Firefox for iOSMozilla	156.1 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1297353
https://www.mozilla.org/security/advisories/mfsa2026-117/

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