What is CVE-2026-44658?

CVE-2026-44658 is a low-severity vulnerability in Zen-browser Desktop, classified under Improper Input Validation. CVSS score: 2.4/10. Published 2026-05-11.

How severe is CVE-2026-44658?

Low severity. CVSS v3 base score is 2.4 out of 10.

Improper input validation in Zen-browser Desktop

CVE-2026-44658

Zen is a firefox-based browser. Prior to 1.19.12b, RSS feed URLs entered by the user are validated to http: or https: in promptForFeedUrl, but item links inside the feed are not subject to the same restriction. The provider maps each RSS/A…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.000 (13.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N.

Affected products

Zen-browser Desktop — versions < 1.19.12b

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44658?: CVE-2026-44658 is a low-severity vulnerability in Zen-browser Desktop, classified under Improper Input Validation. CVSS score: 2.4/10. Published 2026-05-11.
How severe is CVE-2026-44658?: Low severity. CVSS v3 base score is 2.4 out of 10.