CVE-2026-13356
A remote, anonymous attacker can exploit a vulnerability in Mozilla Firefox to display false information.
CSIRTS triage
- What
- A remote, anonymous attacker can exploit a vulnerability in Mozilla Firefox to display false information.
- Who is affected
- Users of Mozilla Firefox for iOS are affected.
- Urgency
- Remediation is medium urgency as the severity is medium and exploitation is possible.
- Action
- Update to the latest version of Firefox for iOS.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (3)
- medium[NEW] [medium] Mozilla Firefox for iOS: Vulnerability allows display of false informationcert-bund · 2026-07-07
- mediumCVE-2026-13356: A malicious webpage could interrupt a pending navigation by enqueuing a synchronous JavaScript…nvd · 2026-07-07
- unknownVulnerability in Mozilla Firefox for iOS (July 7, 2026)cert-fr-avis · 2026-07-07
External references
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[](https://www.csirts.com/cve/CVE-2026-13356)