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CVE-2025-34351 — Vulnerability in ray — CVE Details

CRITICAL

Ray's New Token Authentication is Disabled By Default

Published November 27, 2025Updated September 10, 2026Source: osv

Summary

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.

Advisory Timeline

  • First published November 27, 2025 (319 days ago).
  • Last revised September 10, 2026 — 287 days after initial publication.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
ray
pypi
0.1.1, 0.1.2, 0.2.0, 0.2.1 (+118 more)Range-based data available

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

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

Frequently Asked Questions

What is CVE-2025-34351?
Ray's New Token Authentication is Disabled By Default This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2025-34351?
CVE-2025-34351 affects ray. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-34351 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-gx77-xgc2-4888
PYSEC-2026-518

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