CVE-2026-44658 — Zen Browser: RSS Live-Folder Item URLs Are Not Scheme-Restricted Before Trusted Tab Creation

CVE-2026-44658

Zen Browser: RSS Live-Folder Item URLs Are Not Scheme-Restricted Before Trusted Tab Creation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
zen-browser / desktop	affected < 1.19.12b

CWE

CWE-20

References

https://github.com/zen-browser/desktop/security/advisories/GHSA-cc9c-mmmf-c5j6

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.