---
title: "CVE-2025-34351: Ray's New Token Authentication is Disabled By Default"
url: https://erroneo.us/security/cve/CVE-2025-34351/
description: "CVE-2025-34351 (ray (PyPI)): Ray's New Token Authentication is Disabled By Default"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-11-27
date_modified: 2025-12-09
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-34351"
kev: false
cvss: 9.3
epss: null
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-34351: Ray's New Token Authentication is Disabled By Default

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog. That can change quickly after a public write-up; re-check if you are affected.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes ray (PyPI) <= 2.52.0, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

Ray's New Token Authentication is Disabled By Default

## Affected packages

- PyPI `ray` <= 2.52.0 → fixed: none listed

## Severity

- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).

## Sources

- [GitHub Advisory GHSA-gx77-xgc2-4888](https://github.com/advisories/GHSA-gx77-xgc2-4888)
- [CVE.org record CVE-2025-34351](https://www.cve.org/CVERecord?id=CVE-2025-34351)
- [NVD entry CVE-2025-34351](https://nvd.nist.gov/vuln/detail/CVE-2025-34351)
- [github.com](https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-w8vc-465m-jjw6)
- [docs.ray.io](https://docs.ray.io/en/latest/ray-security/token-auth.html)
- [vulncheck.com](https://www.vulncheck.com/advisories/anyscale-ray-token-authentication-disabled-by-default-insecure-configuration)
- [github.com](https://github.com/ray-project/ray/releases/tag/ray-2.52.0)
- [cve.org](https://www.cve.org/resourcessupport/allresources/cnarules#section_4-1_Vulnerability_Determination)
- [linkedin.com](https://www.linkedin.com/posts/jonathan-leitschuh_the-latest-piece-of-mind-bending-research-activity-7396976425997606912-qizE)
- [oligo.security](https://www.oligo.security/blog/shadowray-2-0-attackers-turn-ai-against-itself-in-global-campaign-that-hijacks-ai-into-self-propagating-botnet)
- [oligo.security](https://www.oligo.security/blog/shadowray-attack-ai-workloads-actively-exploited-in-the-wild)

---
Source page: https://erroneo.us/security/cve/CVE-2025-34351/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt