CVE-2025-62593

Published Nov 26, 2025

Last updated 3 days ago

Exploit known CVSS critical 9.4

Firefox

Dns

Safari

Ray

Overview

AI description

Automated description summarized from trusted sources.

CVE-2025-62593 describes a remote code execution (RCE) vulnerability affecting Ray, an AI compute engine, in versions prior to 2.52.0. The flaw lies in Ray's HTTP API endpoint handling, where an insufficient defense mechanism relies solely on the User-Agent header starting with "Mozilla". This defense is inadequate because the fetch specification allows for the manipulation of the User-Agent header. This vulnerability can be exploited when a developer running Ray visits a malicious website in a vulnerable browser, such as Firefox or Safari. The attack combines the User-Agent bypass with a DNS rebinding attack, tricking the browser into treating a remote attacker-controlled server and the local Ray instance as the same origin. This allows an attacker to trigger arbitrary code execution on the developer's system. The issue has been addressed in Ray version 2.52.0.

Description: 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.
Source: security-advisories@github.com
NVD status: Analyzed
Products: ray

Risk scores

CVSS 4.0

Type: Secondary
Base score: 9.4
Impact score: -
Exploitability score: -
Vector string: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity: CRITICAL

CVSS 3.1

Type: Primary
Base score: 8.8
Impact score: 5.9
Exploitability score: 2.8
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: HIGH

Known exploits

Data from CISA

Vulnerability name: Ray-Project Ray Code Injection Vulnerability
Exploit added on: Aug 17, 2026
Exploit action due: Aug 20, 2026
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weaknesses

security-advisories@github.com: CWE-94

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:anyscale:ray:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "EEAA235D-B305-4247-8840-CCABC90D54C1",
            "versionEndExcluding": "2.52.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.