CVE-2026-27482Public exploitNetwork attack vector

Unauthenticated service interruption via ungated DELETE requests

Published Feb 21, 2026 · Updated Feb 21, 2026

Missing authentication in Ray before 2.54.0 allows remote attackers to shut down Serve or delete jobs through dashboard DELETE requests. The dashboard browser middleware checks POST and PUT but passes DELETE to unauthenticated Serve and job deletion handlers. Exploitation requires a reachable dashboard or agent with optional token authentication disabled; browser delivery also requires a user to visit attacker-controlled content.

CVSS severity5.9
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Ray before 2.54.0 allows remote attackers to shut down Serve or delete jobs through dashboard DELETE requests. The dashboard browser middleware checks POST and PUT but passes DELETE to unauthenticated Serve and job deletion handlers. Exploitation requires a reachable dashboard or agent with optional token authentication disabled; browser delivery also requires a user to visit attacker-controlled content.

The record

CVE
CVE-2026-27482
Published
Feb 21, 2026
Updated
Feb 21, 2026
Vendor
Anyscale
Product
Ray
Classifications
CWE-306, T1489
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.54.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Anyscale · Rayversion=< 2.54.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
5.9GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1489Service Stop

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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