What is CVE-2025-62593?
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.
Timeline
- 2025-11-26Published to the U.S. National Vulnerability Database (NVD)
- 2026-08-17Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-08-18NVD record last updated
- 2026-08-20CISA federal remediation deadline (BOD 22-01)
CISA Known Exploited Vulnerability
Ray-Project Ray Code Injection Vulnerability
Affected product
Ray-Project Ray
Remediation Steps
- Identify systems running the affected product
- Check CISA Known Exploited Vulnerabilities catalog for vendor-specific remediation details
- Apply patches provided by the vendor
- Monitor for indicators of compromise related to active exploitation
References
- https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v
- https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09
- https://www.bitsight.com/blog/rondodox-botnet-infrastructure-analysis
- https://nvd.nist.gov/vuln/detail/CVE-2025-62593
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 3 of August 2026 (August 17 – 23)
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