CVE-2026-45150 Details
Description
Zen is a firefox-based browser. Prior to 1.19.13b, Zen Browser did not provide a persistent, clearly visible security notification when a webpage entered fullscreen mode, allowing an attacker-controlled page to hide the real browser UI and origin information, imitate a trusted website UI, and combine with long-domain URL eliding to spoof a trusted origin for phishing and credential theft. This issue is fixed in version 1.19.13b.
A vulnerability in Zen Browser versions through 1.19.12b allows attacker-controlled webpages to enter fullscreen mode without a visible security notification. This omission can hide the browser's UI and origin information, enabling phishing attacks by imitating trusted websites. The issue is exacerbated by the browser's URL eliding feature, which can further obscure the actual domain, making it easier to spoof a legitimate origin and steal credentials.
Users should update to Zen Browser version 1.19.13b or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 15, 2026CISA-ADP
Assessed Jul 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/zen-browser/desktop/security/advisories/GHSA-vjfv-85qf-v25c | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/zen-browser/desktop/security/advisories/GHSA-vjfv-85qf-v25c | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-451 | User Interface (UI) Misrepresentation of Critical Information | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Zen | <= 1.19.12b |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 15, 2026 | New CVE Received | [email protected] |