CVE-2025-34351: Ray's New Token Authentication is Disabled By Default
Anyscale Ray 2.52.0 contains an insecure default configuration in which token-based authentication for Ray management interfaces (including the dashboard and Jobs API) is disabled unless explicitly enabled by setting RAYAUTHMODE=token. In the default unauthenticated state, a remote attacker with network access to these interfaces can submit jobs and execute arbitrary code on the Ray cluster.
Published Nov 27, 2025 · Updated Dec 1, 2025
Affected packages
ray
- Ecosystem
- PyPI
- Affected
- <= 2.52.0
- Fixed in
- No patched version yet
- Check
pip show ray
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
Anyscale Ray 2.52.0 contains an insecure default configuration in which token-based authentication for Ray management interfaces (including the dashboard and Jobs API) is disabled unless explicitly enabled by setting RAY_AUTH_MODE=token. In the default unauthenticated state, a remote attacker with network access to these interfaces can submit jobs and execute arbitrary code on the Ray cluster. NOTE: The vendor plans to enable token authentication by default in a future release. They recommend enabling token authentication to protect your cluster from unauthorized access.
References
- https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-w8vc-465m-jjw6
- https://nvd.nist.gov/vuln/detail/CVE-2025-34351
- https://docs.ray.io/en/latest/ray-security/token-auth.html
- https://www.vulncheck.com/advisories/anyscale-ray-token-authentication-disabled-by-default-insecure-configuration
- https://github.com/ray-project/ray/releases/tag/ray-2.52.0
- https://www.cve.org/resourcessupport/allresources/cnarules#section_4-1_Vulnerability_Determination
- https://www.linkedin.com/posts/jonathan-leitschuh_the-latest-piece-of-mind-bending-research-activity-7396976425997606912-qizE
- https://www.oligo.security/blog/shadowray-2-0-attackers-turn-ai-against-itself-in-global-campaign-that-hijacks-ai-into-self-propagating-botnet
- https://www.oligo.security/blog/shadowray-attack-ai-workloads-actively-exploited-in-the-wild
- https://github.com/advisories/GHSA-gx77-xgc2-4888
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology
More Ray vulnerabilities
All Ray entriesCVE-2026-57516
Ray: Arbitrary code execution via ray.data.read_webdataset default decoder: pickle.loads(value) and torch.load(weights_only=False)
high8.8Jul 24, 2026CVE-2026-41486
Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization
high8.9Apr 24, 2026CVE-2026-32981
Ray Dashboard is vulnerable to path traversal through its static file handling mechanism
high7.5Mar 17, 2026CVE-2026-27482
Ray dashboard DELETE endpoints allow unauthenticated browser-triggered DoS (Serve shutdown / job deletion)
medium5.9Feb 20, 2026CVE-2025-62593
Ray is vulnerable to Critical RCE via Safari & Firefox Browsers through DNS Rebinding Attack
critical9.4ExploitedNov 26, 2025CVE-2025-1979
ray vulnerable to Insertion of Sensitive Information into Log File
medium6.4Mar 6, 2025