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CVE Vulnerability Details :

CVE-2026-44658

PUBLISHED

More Info Official Page

Assigner-GitHub_M

Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa

Published At-11 May, 2026 | 17:00

Updated At-11 May, 2026 | 19:04

▼CVE Numbering Authority (CNA)

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

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 Products

Vendor

zen-browser

Product

desktop

Versions

Affected

< 1.19.12b

Problem Types

Type	CWE ID	Description
CWE	CWE-20	CWE-20: Improper Input Validation

Type: CWE

CWE ID: CWE-20

Description: CWE-20: Improper Input Validation

Metrics

Version	Base score	Base severity	Vector
3.1	2.4	LOW	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

Version: 3.1

Base score: 2.4

Base severity: LOW

Vector:

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

References

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

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

Resource:

x_refsource_CONFIRM

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

Affected Products

Affected

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Replaced By

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References

Affected Products

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References