CVE-2026-57501
Zen: Context-menu "Open link in glance" / "Split link in new tab" loads a page-controlled link with the System principal, bypassing the web-content scheme restriction
Description
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.
INFO
Published Date :
July 9, 2026, 11:17 p.m.
Last Modified :
Oct. 25, 2026, 3:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | NONE | [email protected] |
Solution
- Update Zen browser to version 1.21.5b.
- Verify the update is successfully applied.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-57501.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-57501 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-57501
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-57501 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-57501 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: desktop de zen-browser, Description: Zen es un navegador basado en Firefox. Antes de la versión 1.21.5b, las acciones del menú contextual de vista rápida (glance) y vista dividida (split-view) de Zen, ’Abrir enlace en vista rápida’ y ’Dividir enlace en nueva pestaña’, cargan una URL de enlace controlada por la página con el principal del Sistema en lugar del principal de la página de origen, permitiendo que una página web maliciosa coloque un enlace a una URL de archivo que puede cargarse con privilegios de Sistema cuando se abre a través de cualquiera de los elementos del menú contextual y eludir la comprobación de seguridad de contenido a archivo que bloquea un clic ordinario. Este problema está solucionado en la versión 1.21.5b. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 10, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-57501', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-10T20:46:27.753145Z'} -
New CVE Received by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'zen-browser', 'product': 'desktop', 'versions': [{'status': 'affected', 'version': '< 1.21.5b'}]}] Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:N Added CWE CWE-266 Added Reference https://github.com/zen-browser/desktop/commit/44f7616238208200547c7df500d945752d7b6379 Added Reference https://github.com/zen-browser/desktop/releases/tag/1.21.5b Added Reference https://github.com/zen-browser/desktop/security/advisories/GHSA-vpvg-hp3v-rm5q