Description
A malicious webpage could stall a popup's cross-origin navigation after commit, causing the address bar to display the destination origin while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iOS 155.0.
Affected products
mozilla: firefox mobile
References2
- www.mozilla.org/security/advisories/mfsa2026-81/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=2052758 Permissions Required
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L - EPSS — exploit probability
- 0% percentile: 18 · as of 8 November 2026
- CWE
- CWE-451
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.