VULNERABILITY INTELLIGENCE
CVE-2026-44658
CVSS score2.4 LOW
EPSS probability0.16%
CISA KEVNot currently listed
Published2026-05-11
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
Description
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/Atom item link into item.url, filters only for presence and date, and returns the item list. The live-folder manager later creates pinned lazy tabs from these values with gBrowser.addTrustedTab(item.url, ...). This vulnerability is fixed in 1.19.12b.
Weakness classification
- CWE-20: Improper Input Validation