Security Digest · Vulnerability record
CVE-2025-34351: Ray's New Token Authentication is Disabled By Default
Ray's New Token Authentication is Disabled By Default
CVSS 9.3 Critical
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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
From the GitHub advisory
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. 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.
Weakness type: CWE-304, CWE-1188.
Product: ray (PyPI) · Assigned by: VulnCheck · Published: 2025-11-27
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | ray | <= 2.52.0 | none listed |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub | 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 |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
Timeline
- — CVE record published by VulnCheck
- — GitHub-reviewed advisory GHSA-gx77-xgc2-4888 published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-gx77-xgc2-4888 github.com
- CVE.org record CVE-2025-34351 cve.org
- NVD entry CVE-2025-34351 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- docs.ray.io docs.ray.io
- vulncheck.com vulncheck.com
- github.com github.com
- cve.org cve.org
- linkedin.com linkedin.com
- oligo.security oligo.security
- oligo.security oligo.security