What is CVE-2025-62593?

CVE-2025-62593 is a high-severity vulnerability in Anyscale Ray, classified under Code Injection. CVSS score: 8.8/10. Published 2025-11-26.

How severe is CVE-2025-62593?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2025-62593 known to be exploited?

Yes. CVE-2025-62593 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-17), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

RCE in Anyscale Ray

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.

Vulnerability class: RCE (Remote Code Execution)

Published 2025-11-26 · last modified 2026-10-19.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.625 (99.2th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.169 · newest: 0.625 · change: +0.456

Affected products

Anyscale Ray
Ray-Project Ray — versions < 2.52.0

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2026-08-17. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2026-08-20.

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.

Public proof-of-concept exploits

References

github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v (Exploit, Patch, Vendor Advisory)
github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09 (Patch)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2025-62593?: CVE-2025-62593 is a high-severity vulnerability in Anyscale Ray, classified under Code Injection. CVSS score: 8.8/10. Published 2025-11-26.
How severe is CVE-2025-62593?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2025-62593 known to be exploited?: Yes. CVE-2025-62593 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-17), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.