CVE-2025-62593 and the CISA KEV listing: what Ray users need to know

CVE-2025-62593 affects Ray releases before version 2.52.0 and allows attackers to exploit a bypassable User-Agent check in the dashboard and job submission API, potentially executing shell commands on a developer’s local machine through a malicious webpage combined with DNS rebinding. Ray fixed the issue in version 2.52.0, released November 26, 2025, by implementing proper browser-origin controls, and CISA added the vulnerability to its Known Exploited Vulnerabilities catalog on August 17, 2026, citing active exploitation of unpatched systems. Users running Ray 2.52.0 or later are not affected, while those on earlier versions should upgrade, enable the opt-in token authentication introduced in 2.52.0, keep dashboards within tightly controlled network boundaries, avoid unnecessary binding to all interfaces, and check pinned dependencies, images, CI environments, and long-lived development systems for outdated versions.

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