Vulnerability record · CVE-2026-13356 · published 7 July 2026

CVE-2026-13356: Mozilla firefox vulnerability

Mozilla · Firefox

A malicious webpage could interrupt a pending navigation by enqueuing a synchronous JavaScript dialog, causing the browser UI to display the destination origin in the address bar while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iOS 152.3.

6.3 CVSS 3.1 Medium EPSS 0.22% · top 88.8% CWE-451 · CWE-451

6.3CVSS 3.1 base score

0.22%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

8 Jul 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Firefox Mozilla

References

Link	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=2047768	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-65/	Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-13356), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.