CVE-2026-65919 in Meshery
Summary
by MITRE • 07/23/2026
Meshery before 1.0.57 contains an unauthenticated arbitrary file read vulnerability in the /api/system/fileView and /api/system/fileDownload endpoints that pass user-supplied file parameters directly to os.Open without path validation. Attackers can supply absolute paths or traversal sequences in the file parameter to read arbitrary files from the host filesystem without authentication.
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Analysis
by VulDB Data Team • 07/23/2026
Meshery versions prior to 1057 contain a critical unauthenticated arbitrary file read vulnerability affecting the /api/system/fileView and /api/system/fileDownload endpoints. This vulnerability stems from improper input validation where user-supplied file parameters are directly passed to the os.Open function without adequate path validation or sanitization. The flaw allows attackers to exploit the system by supplying absolute paths or directory traversal sequences such as ../../etc/passwd within the file parameter, enabling unauthorized access to arbitrary files on the host filesystem. This represents a severe security weakness that fundamentally undermines the application's file access controls and exposes sensitive system information to potential adversaries.
The technical implementation of this vulnerability aligns with common software security weaknesses documented in CWE-22, which addresses improper limitation of a pathname to a restricted directory, also known as path traversal or directory traversal attacks. This class of vulnerability occurs when applications fail to properly validate user input before using it in file system operations, allowing attackers to manipulate file paths and gain access to resources they should not be able to reach. The absence of authentication requirements for these endpoints compounds the risk, making the vulnerability exploitable by any attacker without requiring valid credentials or privileges.
From an operational impact perspective, this vulnerability creates significant risks for Meshery users and administrators who may unknowingly expose sensitive data including configuration files, system credentials, application logs, and other confidential information stored on the host filesystem. The lack of authentication means that attackers can systematically enumerate and extract valuable data without detection, potentially leading to further compromise through credential theft or information disclosure. This vulnerability also presents a potential vector for privilege escalation attacks where attackers might access system-level files that could reveal additional attack surfaces or provide insight into the underlying infrastructure.
The implications of this vulnerability extend beyond immediate data exposure and align with several tactics identified in the MITRE ATT&CK framework under the T1005 category for Data from Local System, and potentially T1213 for Data from Information Repositories. Organizations using affected versions of Meshery should immediately implement mitigations including upgrading to version 1057 or later, implementing proper input validation and sanitization for all file system operations, and enforcing authentication requirements for system-level API endpoints. Additional protective measures such as network segmentation, monitoring for suspicious file access patterns, and regular security assessments can help reduce the attack surface and detect potential exploitation attempts.