CVE-2025-62593
Ray-Project Ray Code Injection Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 20 August 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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 4.0
- 9.4 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 62.46% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 17 August 2026 · due 20 August 2026
- Weakness
- CWE-94, CWE-352
- Affected
- anyscale/ray
- Source
- security-advisories@github.com
EPSS moved from 27.3% on 24 September 2026 to 62.5% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
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. https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v ; https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2025-62593
References
- https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09Patch
- https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6vExploit, Patch, Vendor Advisory
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.