CVE-2026-65919 Scanner

Meshery is an open-source, cloud-native management fabric used for the coordination of various service mesh implementations. Organizations use it to monitor, control, and integrate service meshes across cloud providers. It is designed to manage large-scale microservices environments, facilitating the seamless operation of different service mesh topologies. Users can deploy it to handle configuration, testing, and validation of service meshes. Meshery is commonly used by developers and system administrators who deal with Kubernetes environments. Its modular architecture enables extension and communication with various plugins and components through APIs.

The Arbitrary File Read vulnerability allows unauthenticated attackers to read files from the host system. This vulnerability arises due to insufficient path validation in the file handling endpoints, specifically /api/system/fileView and /api/system/fileDownload. The lack of input sanitization means attackers can exploit this flaw to potentially access sensitive system files. An attacker can use traversal sequences or provide absolute paths to the functions to execute the attack. Failure to patch this vulnerability can lead to significant data breaches and leakage of sensitive information. The vulnerability is a common concern in file handling errors across web applications.

The vulnerability in Meshery involves misuse of file paths for access controls, directly utilizing the user-supplied file input without validation. The vulnerable endpoints /api/system/fileView and /api/system/fileDownload leverage os.Open to process file requests. Without proper validation, absolute paths or directory traversal characters are accepted, enabling potential attackers to access any file on the host machine. Regex patterns like 'root:.*:0:0:' are indications of successful exploitation attempts. Conditions for exposing the flaw occur when inputs are not regulated or sanitized, assuming trusted usage, which fosters this backdoor into the host's file system. Remediation requires updating to patched versions where such direct file access is curtailed or controlled.

Exploitation of this vulnerability allows attackers to access files without proper authentication or authorization. Sensitive data such as credentials, configuration files, or personal user information might be exposed. Systems with valuable or private data are at significant risk, including potential further compromise or data availability violations. Depending on the data exposed, attackers can further leverage the information to carry out additional attacks on the system, like privilege escalation or impersonation. To mitigate these effects, prompt updating and patch management strategies are crucial to close these unauthorized access paths.

REFERENCES

• https://github.com/meshery/meshery/issues/20076
• https://github.com/meshery/meshery/pull/20133
• https://github.com/meshery/meshery/commit/ea83a26cb090b13be36c07cf24a99f8c637cc765
• https://www.vulncheck.com/advisories/meshery-unauthenticated-arbitrary-file-read-via-fileview-and-filedownload
• https://nvd.nist.gov/vuln/detail/CVE-2026-65919