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Dossier · Vulnerability

Actively exploited · CISA KEV · NVD published 2025-11-26

CVE-2025-62593

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.

  1. KEV
  2. 2 days →First PoC

Signals

Exploited in the wild
Yesadded 2026-08-17 · due 2026-08-20. An observation, not a forecast.
EPSS · 30-day forecast
62%Chance of exploitation in the next 30 days, 99th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD · HIGH
8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Internet exposure
not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

3 known · links only

GitHub PoCs · by trust, then stars2

  1. Boreas37/CVE-2025-62593-PoC ↗Trust ok 100

    PoC for CVE-2025-62593: unauthenticated RCE in Ray (CISA KEV). Stdlib-only Python.

    ★ 2 · created 2026-08-18

  2. maxprog-svg/CVE-2026-33017 ↗Trust ok 100

    CVE-2025-62593 — Ray Unauthenticated RCE Exploit is an unauthenticated remote code execution vulnerability in the Ray distributed AI compute engine.

    ★ 0 · created 2026-09-01

Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.

Nuclei1

  1. Ray < 2.52.0 - Remote Code Execution ↗

    Ray versions prior to 2.52.0 allow unauthenticated remote code execution via the job submission API at /api/jobs/. A weak User-Agent heuristic (rejecting Mozilla-prefixed headers) can be bypassed by non-browser clients, enabling arbitrary command execution when the dashboard is network-reachable.

    yaml · seen 2026-10-18

On the wire

1 dispatch
  1. [KEV] CVE-2025-62593: Ray-Project Ray Code Injection VulnerabilityKEV

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