CVE-2026-45150
Zen Browser - Missing Fullscreen Security Notification Allows Origin Spoofing
Description
Zen is a firefox-based browser. Prior to 1.19.13b, Zen Browser did not provide a persistent, clearly visible security notification when a webpage entered fullscreen mode, allowing an attacker-controlled page to hide the real browser UI and origin information, imitate a trusted website UI, and combine with long-domain URL eliding to spoof a trusted origin for phishing and credential theft. This issue is fixed in version 1.19.13b.
INFO
Published Date :
July 15, 2026, 4:16 p.m.
Last Modified :
Oct. 24, 2026, 9:10 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 4.0 | MEDIUM | [email protected] |
Solution
- Update Zen Browser to version 1.19.13b.
- Ensure persistent security notifications are enabled.
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-2026-45150.
| URL | Resource |
|---|---|
| https://github.com/zen-browser/desktop/security/advisories/GHSA-vjfv-85qf-v25c | |
| https://github.com/zen-browser/desktop/security/advisories/GHSA-vjfv-85qf-v25c |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45150 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-2026-45150
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-2026-45150 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45150 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.
-
CVE Translated by [email protected]
Oct. 24, 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 1.19.13b, el navegador Zen no proporcionaba una notificación de seguridad persistente y claramente visible cuando una página web entraba en modo de pantalla completa, lo que permitía a una página controlada por un atacante ocultar la interfaz de usuario (UI) real del navegador y la información de origen, imitar la UI de un sitio web de confianza, y combinarse con la elisión de URL de dominio largo para suplantar un origen de confianza para phishing y robo de credenciales. Este problema está solucionado en la versión 1.19.13b. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 15, 2026
Action Type Old Value New Value Added Reference https://github.com/zen-browser/desktop/security/advisories/GHSA-vjfv-85qf-v25c Added SSVC {'id': 'CVE-2026-45150', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-15T17:44:09.603889Z'} -
New CVE Received by [email protected]
Jul. 15, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'zen-browser', 'product': 'desktop', 'versions': [{'status': 'affected', 'version': '< 1.19.13b'}]}] Added Description Zen is a firefox-based browser. Prior to 1.19.13b, Zen Browser did not provide a persistent, clearly visible security notification when a webpage entered fullscreen mode, allowing an attacker-controlled page to hide the real browser UI and origin information, imitate a trusted website UI, and combine with long-domain URL eliding to spoof a trusted origin for phishing and credential theft. This issue is fixed in version 1.19.13b. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-451 Added Reference https://github.com/zen-browser/desktop/security/advisories/GHSA-vjfv-85qf-v25c