---
id: CVE-2025-62593
title: Ray is an AI compute engine
summary: >-
  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 gu…
severity: critical
cwe:
  - CWE-94
  - CWE-352
published: '2025-11-26'
updated: '2026-08-17'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62593'
references:
  - url: >-
      https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09
    label: security-advisories@github.com
  - url: 'https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v'
    label: security-advisories@github.com
  - url: 'https://www.bitsight.com/blog/rondodox-botnet-infrastructure-analysis'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62593'
  - url: 'https://github.com/nccgroup/singularity/pull/68'
  - url: 'https://docs.ray.io/en/releases-2.51.1/ray-security/index.html'
  - url: 'https://en.wikipedia.org/wiki/Malvertising'
  - url: 'https://github.com/ray-project/ray'
  - url: >-
      https://github.com/ray-project/ray/blob/e7889ae542bf0188610bc8b06d274cbf53790cbd/python/ray/dashboard/http_server_head.py#L184-L196
  - url: >-
      https://github.com/ray-project/ray/blob/f39a860436dca3ed5b9dfae84bd867ac10c84dc6/python/ray/dashboard/optional_utils.py#L129-L155
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
  - osv
  - pip
epss: 0.62459
epssPercentile: 0.99161
kev: true
kevDateAdded: '2026-08-17'
kevDueDate: '2026-08-20'
kevRansomware: false
exploited: true
ingestedAt: '2026-08-17T14:55:59.138Z'
exploits:
  github: 2
  githubRepos:
    - 'https://github.com/Boreas37/CVE-2025-62593-PoC'
    - 'https://github.com/maxprog-svg/CVE-2026-33017'
  nuclei:
    - CVE-2025-62593
  checkedAt: '2026-09-26T09:05:34.375Z'
exploitAvailable: true
aliases:
  - GHSA-q279-jhrf-cc6v
  - PYSEC-2026-520
ecosystem: pip
vendor: ray
product: ray
affected:
  - ray < 2.52.0
patched:
  - ray 2.52.0
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2025-62593)

Affected packages:

- `ray < 2.52.0`

Patched in:

- `ray 2.52.0`

Source: https://osv.dev/vulnerability/GHSA-q279-jhrf-cc6v