Overview
A critical Remote Code Execution (RCE) vulnerability, identified as CVE-2025-62593, has been discovered in Ray, a distributed AI compute engine. This vulnerability affects developers using Ray as a development tool and can be exploited through browsers like Firefox and Safari. The issue stems from an insufficient defense against browser-based attacks, making Ray installations vulnerable to malicious websites and malvertising campaigns. A patch is available in version 2.52.0.
Technical Details
The vulnerability in Ray AI arises from an inadequate guard against browser-based attacks. The existing defense relies on checking the User-Agent header for the string “Mozilla”. However, the fetch specification permits modification of the User-Agent header, rendering this defense ineffective. By combining this weakness with a DNS rebinding attack against the browser, an attacker can execute arbitrary code on the developer’s machine when they inadvertently visit a malicious website or are exposed to a malicious advertisement (malvertising) while running Ray.
CVSS Analysis
CVSS Score and Severity are currently unavailable as this is a newly published vulnerability. A full CVSS analysis is pending. However, given the potential for Remote Code Execution, it is likely to be rated as Critical or High Severity.
Possible Impact
Successful exploitation of CVE-2025-62593 can lead to severe consequences, including:
- Remote Code Execution: Attackers can execute arbitrary code on the developer’s machine.
- Data Theft: Sensitive data stored on or accessible from the compromised machine can be stolen.
- System Compromise: The entire system can be compromised, potentially leading to further lateral movement within the network.
- Supply Chain Attacks: Compromised developer machines could be used to inject malicious code into software projects, leading to supply chain attacks.
Mitigation and Patch Steps
The primary mitigation step is to upgrade Ray AI to version 2.52.0 or later. This version contains a patch that addresses the vulnerability. Until you can upgrade, avoid visiting untrusted websites while running Ray. Also, exercise caution when clicking on advertisements from unknown sources. Furthermore, enabling browser security features designed to mitigate DNS rebinding attacks may provide an additional layer of protection.
References
Ray Commit Patch (github.com)
Ray Security Advisory (github.com)
