Ray is an AI compute engine. Prior to version 2.52.0, developers working with Ray as a development tool can be exploited via a critical RCE vulnerability exploitable via Firefox and Safari. This vulnerability is due to an insufficient guard against browser-based attacks, as the current defense uses the User-Agent header starting with the string "Mozilla" as a defense mechanism. This defense is insufficient as the fetch specification allows the User-Agent header to be modified. Combined with a DNS rebinding attack against the browser, and this vulnerability is exploitable against a developer running Ray who inadvertently visits a malicious website, or is served a malicious advertisement (malvertising). This issue has been patched in version 2.52.0.
[POC] CVE-2025-62593 — CVE-2025-62593-PoC
PoC for CVE-2025-62593: unauthenticated RCE in Ray (CISA KEV). Stdlib-only Python.
[POC] CVE-2025-62593 — CVE-2026-33017
CVE-2025-62593 — Ray Unauthenticated RCE Exploit is an unauthenticated remote code execution vulnerability in the Ray distributed AI compute engine.
[POC] CVE-2025-62593 — Blackash-CVE-2025-62593
CVE-2025-62593
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