CVE-2026-120987
Received Received - Intake

Whale Browser iframe Sandbox Bypass Vulnerability

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Naver Corporation

Description
Whale Browser before 5.39.412.57 allows an attacker to bypass the iframe sandbox in a dual-tab environment.

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Meta Information

Published
2026-11-03
Last Modified
2026-11-03
Generated
2026-11-03
AI Q&A
2026-11-03
EPSS Evaluated
N/A
NVD
CVE-2026-120987

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
navercorp whale_browser to 5.39.412.57 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-346 The product does not properly verify that the source of data or communication is valid.

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Executive Summary

The Whale Browser before version 5.39.412.57 has a vulnerability where an attacker can bypass the iframe sandbox feature when using a dual-tab environment. This means malicious code in one tab could potentially interact with or escape the restricted sandbox of another tab.

Impact Analysis

This vulnerability could allow attackers to execute unauthorized actions or access sensitive data in other tabs. Users might face risks like data theft, session hijacking, or malicious script execution if they visit untrusted websites.

Mitigation Strategies

Update Whale Browser to version 5.39.412.57 or later to address the iframe sandbox bypass issue.

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