CVE-2025-62593: Ray-Project Ray Code Injection Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2026-08-17. EPSS: 62.5% chance of exploitation in the next 30 days.

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.

Affected products

• Anyscale Ray: before 2.52.0 (fixed in 2.52.0)

Published 2025-11-26. Last modified 2026-10-01.