CVE-2025-62593

CVE-2025-62593 is a high-severity vulnerability in Anyscale Ray with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-08-17). The underlying weakness is classified as CWE-94.

Key facts

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.

Frequently asked questions

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.
How severe is CVE-2025-62593?
CVE-2025-62593 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-62593 being actively exploited?
Yes. CVE-2025-62593 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-08-17, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-62593?
CVE-2025-62593 affects Anyscale Ray. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-62593?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-62593 have an EU (EUVD) identifier?
Yes. CVE-2025-62593 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199754.
When was CVE-2025-62593 published?
CVE-2025-62593 was published on 2025-11-26 and last updated on 2026-08-18.

References

Affected products (1)

More vulnerabilities in Anyscale Ray

All CVEs affecting Anyscale Ray →

Other CWE-94 (Code Injection) vulnerabilities

Browse all CWE-94 (Code Injection) vulnerabilities →