What’s Vulnerable › Vulnerabilities

CVE-2026-94181: Address Bar Spoof Risk; Missing Fullscreen Notification via Select Element

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-23 · updated 2026-09-24
• Weakness: CWE-451

Description

An address bar spoofing issue in affected versions of Arc could allow an attacker to spoof the browser address bar via a <select> element that triggers requestFullscreen without displaying the fullscreen notification.

Affected products

• The Browser Company of New York Arc: before 1.159.0 — fixed in 1.159.0

How to fix

Upgrade to a fixed version: The Browser Company of New York Arc 1.159.0. Check the vendor advisory for mitigations.

References

• https://arc.net/security/bulletins#cve-2026-94181-address-bar-spoof-risk-missing-fullscreen-notification-via-select-element
• https://hackerone.com/reports/3711701

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