What is CVE-2026-81267?

CVE-2026-81267 is a medium-severity vulnerability, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.4/10. Published 2026-08-31.

How severe is CVE-2026-81267?

Medium severity. CVSS v3 base score is 5.4 out of 10.

CVE-2026-81267

CVE-2026-81267

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 v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.

Weakness classification (CWE)

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

References

security@mozilla.org
security@mozilla.org

Frequently asked questions

What is CVE-2026-81267?: CVE-2026-81267 is a medium-severity vulnerability, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.4/10. Published 2026-08-31.
How severe is CVE-2026-81267?: Medium severity. CVSS v3 base score is 5.4 out of 10.