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CVE Vulnerability Details :
CVE-2026-44659
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-11 May, 2026 | 17:01
Updated At-12 May, 2026 | 16:13
Rejected At-
▼CVE Numbering Authority (CNA)
Zen Browser Mac - Address Bar Spoofing via Long Subdomain

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.

Affected Products
Vendor
zen-browser
Product
desktop
Versions
Affected
  • < 1.19.12b
Problem Types
TypeCWE IDDescription
CWECWE-451CWE-451: User Interface (UI) Misrepresentation of Critical Information
Type: CWE
CWE ID: CWE-451
Description: CWE-451: User Interface (UI) Misrepresentation of Critical Information
Metrics
VersionBase scoreBase severityVector
3.14.7MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Version: 3.1
Base score: 4.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/zen-browser/desktop/security/advisories/GHSA-7p2r-fp29-9w69
x_refsource_CONFIRM
Hyperlink: https://github.com/zen-browser/desktop/security/advisories/GHSA-7p2r-fp29-9w69
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Details not found