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TI-2026-41404 Aliases CVE-2026-57501

Zen: Context-menu "Open link in glance" / "Split link in new tab" loads a page-controlled…

Priority LOW 3CWE-266Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-266.

Summary

Zen is a firefox-based browser. Prior to 1.21.5b, Zen's glance and split-view context-menu actions, Open link in glance and Split link in new tab, load a page-controlled link URL with the System principal instead of the originating page's principal, allowing a malicious web page to place a link to a file URL that can load with System privileges when opened through either context-menu item and bypass the content-to-file security check that blocks an ordinary click. This issue is fixed in version 1.21.5b.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00506 43rd percentileScored 2026-11-07
Fix Fixed desktop (zen-browser): 1.21.5b

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zen-browserdesktopbefore 1.21.5b1.21.5bPatch availableCNA
  • desktop Vendorzen-browser Affected before 1.21.5b Fixed in 1.21.5b Patch available CNA

Remediation

  • Fix · CNA desktop (zen-browser) Fixed in 1.21.5b

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-57501

References

Other 3

  • TI-2026-30030 Zen Browser MAR updater ships with signature verification removed — unsigned updates accepted CVSS 3.1HIGH 8.0
  • TI-2026-32978 Zen Browser - Missing Fullscreen Security Notification Allows Origin Spoofing CVSS 4.0MEDIUM 6.3
  • TI-2026-32559 Zen Browser Mac - Address Bar Spoofing via Long Subdomain CVSS 3.1MEDIUM 4.7
  • TI-2026-32558 Zen Browser: RSS Live-Folder Item URLs Are Not Scheme-Restricted Before Trusted Tab Creation CVSS 3.1LOW 2.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences