CVE-2026-44659— Zen Browser Mac - Address Bar Spoofing via Long Subdomain
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| zen-browser | desktop | < 1.19.12b | affected |
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I. Basic Information for CVE-2026-44659
Vulnerability Information
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Vulnerability Title
Zen Browser Mac - Address Bar Spoofing via Long Subdomain
Source: NVD (National Vulnerability Database)
Vulnerability Description
Zen is a firefox-based browser. Prior to 1.19.12b, the ZEN Browser incorrectly truncates long hostnames in the address bar and shows only the attacker-controlled prefix of the subdomain, hiding the actual registrable domain (eTLD+1). As a result, an attacker can craft extremely long malicious subdomains that visually imitate trusted brands, and the browser will display only the spoofed prefix, misleading users about the actual origin of the site. This directly compromises the URL bar as a security indicator and creates a phishing/supply-chain attack vector. This vulnerability is fixed in 1.19.12b.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键信息的UI错误表达
Source: NVD (National Vulnerability Database)
Vulnerability Title
Zen 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zen是Zen开源的一款基于Firefox的高效生产力浏览器。 Zen 1.19.12b之前版本存在安全漏洞，该漏洞源于地址栏错误地截断长主机名并仅显示攻击者控制的子域名前缀，可能导致用户被误导关于网站的实际来源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| zen-browser | desktop | < 1.19.12b | - |
II. Public POCs for CVE-2026-44659
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · zen-browser · 2026-05-11 · 3 CVEs total
| CVE-2026-41431 | 8.0 HIGH | Zen Browser MAR updater ships with signature verification removed — unsigned updates accep |
| CVE-2026-44658 | 2.4 LOW | Zen Browser: RSS Live-Folder Item URLs Are Not Scheme-Restricted Before Trusted Tab Creati |
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V. Comments for CVE-2026-44659
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