cvedb.io
CVE-2026-44659
MEDIUM · CVSS 4.7
EPSS exploitation probability: 0%
Published 2026-05-11T18:16:38.380 · Last modified 2026-06-17T10:51:12.247

Summary

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.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.