CVE-2025-62593

Act now ● On CISA KEV — actively exploited

Actively exploited — on the CISA KEV list.

CVSS base

8.8 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS — probability of exploitation (30 days)

16.9%

96.9th percentile

CISA KEV

Listed

Added 2026-08-17 · patch by 2026-08-20

Weakness / dates

CWE-94

Published 2025-11-26 · modified 2026-08-18

CVSS breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector	N	Network
Attack Complexity	L	Low
Privileges Required	N	None
User Interaction	R	Required
Scope	U	Unchanged
Confidentiality	H	High
Integrity	H	High
Availability	H	High

Timeline

2025-11-26 — Published (NVD)
2026-08-17 — Added to CISA KEV (actively exploited)
2026-08-20 — CISA patch-by deadline
2026-08-18 — Last modified (NVD)

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.

Affected

anyscale

References

Official: NVD · CVE.org