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

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.

9.4 CRITICALEPSS 60.15%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-10-19 13:10 UTC

OverviewCVSS details

9.4CRITICALCVSS 4.0

Score source: GitHub_M (CNA)
NVD status: Analyzed
Published: Nov 26, 2025
Assigner: GitHub_M

Affected

ray (ray-project)

Versions: < 2.52.0

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Aug 17, 2026
KEV due date: Aug 20, 2026
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

60.15%chance of exploitation in 30 days

Higher than 99.14% of CVEs

CVSS 4.0 · GitHub_M (CNA)

9.4Critical

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

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: None
User interaction: Passive
Confidentiality impact: High
Integrity impact: High
Availability impact: High
Confidentiality (other systems): High
Integrity (other systems): High
Availability (other systems): High

CVSS 3.1 · NVD

8.8High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.4	CRITICAL	4.0GitHub_M (CNA)	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
8.8	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA required action

⚡ Known exploited · remediation due Aug 20, 2026

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.

Details

CVE ID: CVE-2025-62593
Status: Analyzed
Assigner (CNA): GitHub_M
Published: Nov 26, 2025
Last modified: 2026-10-19 13:10 UTC
Weaknesses: CWE-94 · Improper Control of Generation of Code ('Code Injection')
CWE-352 · Cross-Site Request Forgery (CSRF)

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:23 UTC.