CVE-2026-81267 — MEDIUM (5.4)

Q: How severe is CVE-2026-81267?

CVE-2026-81267 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-81267?

Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox Mobile.

Vulnerability 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.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Mozilla	Firefox Mobile	< 155.0

Related Weaknesses (CWE)

CWE-451

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2052758Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-81/Vendor Advisory

FAQ

What is CVE-2026-81267?

CVE-2026-81267 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 v...

How severe is CVE-2026-81267?

CVE-2026-81267 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-81267?

Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox Mobile.