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
- 16.89% probability · 97th percentile
- CISA KEV
- Listed 17 August 2026 · due 20 August 2026
- Weakness
- CWE-94, CWE-352
- Affected
- anyscale/ray
- Source
- security-advisories@github.com
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. Refreshed daily.