CVE-2025-62593 CRITICAL

CVE-2025-62593: Ray is vulnerable to RCE via Safari & Firefox Browsers through DNS Rebinding Attack

Vendor Ray-Project
Product ray
Weakness CWE-94 · Code injection
Published November 26, 2025
Last update November 28, 2025

CVSS base score

9.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 26, 2025 CVE published
November 28, 2025 Record updated