TI-2026-56106 Aliases CVE-2026-81267 GHSA-pp56-4328-qwfp

Stalled popup navigation could allow address bar origin spoofing in Firefox for iOS

LOW 24CWE-451Published 2026-08-31 · Updated 2026-08-31

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: Low · None · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-451.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00257 17th percentileScored 2026-11-07

Fix Fixed Firefox for iOS (Mozilla): 155.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Firefox for iOS	—	155.0	Patch available	CNA

Firefox for iOS VendorMozilla Affected — Fixed in 155.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox_mobile::::::iphone_os::*	before 155.0	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:iphone_os:*:* Versions before 155.0 Vulnerable ·Mozilla

Remediation

Fix · CNA Firefox for iOS (Mozilla) Fixed in 155.0

Timeline

2026-10-02 Threatist record created from CVE-2026-81267
2026-10-03 Alias added: GHSA-pp56-4328-qwfp

References

Advisory 1

https://www.mozilla.org/security/advisories/mfsa2026-81/

Other 1

https://bugzilla.mozilla.org/show_bug.cgi?id=2052758

TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
TI-2022-09831 Use after free in Mozilla Firefox KEVCVSS 3.1HIGH 8.8
TI-2023-13905 Race condition in Mozilla Firefox for Android CVSS 3.1HIGH 7.5
TI-2023-13916 A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization… CVSS 3.1MEDIUM 6.5
TI-2023-13903 Following a Garbage Collector compaction, weak maps may have been accessed before they… CVSS 3.1MEDIUM 6.5
TI-2022-13642 Information disclosure in Mozilla Firefox for iOS CVSS 3.1MEDIUM 6.5

See all 86 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences