Vulnerability details

CVE-2025-62593

Actively exploited

ray-project ray

Ray is vulnerable to RCE via Safari & Firefox Browsers through DNS Rebinding Attack

CVSS 4.0

9.4Critical

Remedy

Required action (CISA): 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. (due: 2026-08-20)

Official 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.

CVSS scores

Score	Version	Source	Vector
9.4Critical	4.0	CVEProject cvelistV5 (CNA) (GitHub_M)	`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`

Affected products

Vendor	Product	Versions	Source
ray-project	ray	< 2.52.0	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v x_refsource_CONFIRM
https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09 x_refsource_MISC
https://www.bitsight.com/blog/rondodox-botnet-infrastructure-analysis third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62593 government-resource

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Details

Published: 2025-11-27
Last updated: 2026-10-01
State: Published
Assigner (CNA): GitHub_M
Kolun priority: 79 · High

CISA KEV catalog

Date added: 2026-08-17
Due date: 2026-08-20
Used in ransomware: Unknown

Exploit prediction (EPSS)

60.15%

Probability of exploitation in 30 days

99.1%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Active
Technical impact: Total

Weaknesses (CWE)

CWE-94
Improper Control of Generation of Code ('Code Injection')
CWE-352
Cross-Site Request Forgery (CSRF)