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

> CVE-2025-62593: Ray is vulnerable to RCE via Safari & Firefox Browsers through DNS Rebinding Attack. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-62593
Last updated: 2026-10-19T13:10:00Z

- Published: 2025-11-26 22:28 UTC · Updated: 2026-10-19 13:10 UTC · Assigner: GitHub\_M
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 62.5%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-08-17, federal due date 2026-08-20, ransomware use: Unknown
- CWE: CWE-352, CWE-94

## 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.

## CISA 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.

## Affected vendors and products

- ray-project: ray

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-62593)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-62593)
- [https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09](https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09)
- [https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v](https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-62593 · Markdown: https://rewindex.com/cve/CVE-2025-62593.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-62593 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:16:27.116Z