Critical 9.4Known exploited (CISA KEV)Published Nov 26, 2025

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

Updated under an hour ago (2026-10-19 06:30 UTC)

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It affects ray-project ray and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Aug 17, 2026; federal agencies had to remediate by Aug 20, 2026. Treat that date as your deadline.

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Every CVE for ray-project ray

Exploited in the last 30 days

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.

CVSS: 9.4 CRITICAL (v4.0, 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
Weakness (CWE): CWE-94, CWE-352
Known exploited: Added to CISA KEV Aug 17, 2026; federal remediation due Aug 20, 2026Apply 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.
EPSS (exploitation in the next 30 days): 62.46% (percentile 99)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ray-project ray ray_project:ray (from the name)	before 2.52.0	CNA record
anyscale ray anyscale:ray	before 2.52.0	NVD

References

https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6vx-refsource-confirm, exploit, patch, vendor-advisory
https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09x-refsource-misc, patch
https://www.bitsight.com/blog/rondodox-botnet-infrastructure-analysisthird-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62593us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.