CVE-2026-58522 in Edge
Summary
by MITRE • 07/04/2026
Relative path traversal in Microsoft Edge for Android allows an unauthorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 07/04/2026
This vulnerability represents a critical security flaw in Microsoft Edge for Android that enables unauthorized attackers to perform relative path traversal attacks against local system resources. The issue stems from insufficient input validation and sanitization within the browser's handling of file paths and resource access mechanisms. When processing certain web content or user interactions, the browser fails to properly validate file system paths, allowing malicious actors to manipulate relative path references and gain unauthorized access to sensitive local files. This weakness directly aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal vulnerabilities. The vulnerability specifically affects the Android variant of Microsoft Edge browser and demonstrates how mobile browser implementations can expose system resources through inadequate security controls in their file access APIs.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could potentially enable attackers to access sensitive user data, application configuration files, cached content, or other locally stored information that should remain protected from web-based access. Mobile browsers face unique challenges in balancing web functionality with system security boundaries, and this flaw illustrates the complexity of maintaining proper sandboxing mechanisms across different operating system environments. Attackers could leverage this vulnerability to access personal documents, browsing history, cookies, or other cached data that resides within the browser's local storage areas. The attack surface is particularly concerning given that mobile devices often contain more sensitive personal information than traditional desktop systems, making such vulnerabilities especially dangerous in the context of mobile threat models.
Security professionals should consider this vulnerability in relation to ATT&CK technique T1059 which covers command and script interpreters, as path traversal attacks can serve as initial access vectors for more sophisticated exploitation. The flaw also relates to broader mobile security concerns around sandbox escape techniques and privilege escalation within mobile browser environments. Mitigation strategies should focus on implementing robust input validation mechanisms, proper path normalization, and strict enforcement of file system access controls within the browser's Android implementation. Microsoft should prioritize updating the Edge browser with proper path validation routines that prevent relative path manipulation attempts and ensure that all file system operations are properly sandboxed. Organizations should also consider implementing network-based monitoring to detect unusual file access patterns that might indicate exploitation attempts, while users should maintain updated browser versions and exercise caution when visiting untrusted websites that could potentially exploit such vulnerabilities in mobile browsing environments.