CVE-2019-13663 — Google Chrome Vulnerability

What is CVE-2019-13663?

IDN spoofing in Omnibox in Google Chrome prior to 77.0.3865.75 allowed a remote attacker to perform domain spoofing via IDN homographs via a crafted domain name.

Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 2513 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 4.3 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
EPSS (FIRST): 0.6% probability of exploitation in the next 30 days, higher than 48.9% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 4.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2019-11-25, last modified 2024-08-04

Is CVE-2019-13663 being exploited?

It currently carries a trending score of 17 in the Threadlinqs vulnerability feed.

Affected products and versions

Google: Chrome

How to fix CVE-2019-13663

No vendor patch reference has been recorded for CVE-2019-13663 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2019-13663

1 tracked threat in the Threadlinqs corpus references CVE-2019-13663, either in the campaign’s CVE list or as an indicator on the campaign record.

New IDN Domain Spoofing Techniques (Breaker Characters and Diacritic Handling) Bypass Chromium Lookalike Phishing Protections — MEDIUM · 2026-10-12

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-12. This product uses the NVD API but is not endorsed or certified by the NVD.

CVE-2019-13663 — Google Chrome