Open-Source Security Intelligence

Know every vulnerability
before it knows you.

DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.

Checkout DevGuardView on GitHub
Search

GHSA-q5fh-2hc8-f6rq

MediumCVSS 5.9 / 10
Published Feb 20, 2026·Last modified Feb 24, 2026
Affected Components(0)

No affected components available

Description

Summary

Ray’s dashboard HTTP server blocks browser-origin POST/PUT but does not cover DELETE, and key DELETE endpoints are unauthenticated by default. If the dashboard/agent is reachable (e.g., --dashboard-host=0.0.0.0), a web page via DNS rebinding or same-network access can issue DELETE requests that shut down Serve or delete jobs without user interaction. This is a drive-by availability impact.

Details

  • Middleware: python/ray/dashboard/http_server_head.py#get_browsers_no_post_put_middleware only checks POST/PUT via is_browser_request (UA/Origin/Sec-Fetch heuristics). DELETE is not gated.
  • Endpoints lacking browser protection/auth by default:
    • python/ray/dashboard/modules/serve/serve_head.py: @routes.delete("/api/serve/applications/") calls serve.shutdown().
    • python/ray/dashboard/modules/job/job_head.py: @routes.delete("/api/jobs/{job_or_submission_id}").
    • python/ray/dashboard/modules/job/job_agent.py: @routes.delete("/api/job_agent/jobs/{job_or_submission_id}") (not wrapped with deny_browser_requests either).
  • Dashboard token auth is optional and off by default; binding to 0.0.0.0 is common for remote access.

PoC

Prereqs: dashboard reachable (e.g., ray start --head --dashboard-host=0.0.0.0), no token auth.

  1. Start Serve (or have jobs present).
  2. From any browser-reachable origin (DNS rebinding or same-LAN page), issue a DELETE fetch:
fetch("http://<dashboard-host>:8265/api/serve/applications/", {
    method: "DELETE",
    headers: { "User-Agent": "Mozilla/5.0" }  // browsers set this automatically
  });

Result: Serve shuts down. 3) Similarly, delete jobs:

fetch("http://<dashboard-host>:8265/api/jobs/<job_or_submission_id>", { method: "DELETE" }); fetch("http://<dashboard-agent>:52365/api/job_agent/jobs/<job_or_submission_id>", { method: "DELETE" });

Browsers will send the Mozilla UA and Origin/Sec-Fetch headers, but DELETE is not blocked by the middleware, so the requests succeed.

Impact

  • Availability loss: Serve shutdown; job deletion. Triggerable via drive-by browser requests if the dashboard/agent ports are reachable and auth is disabled (default).
  • No code execution from this vector, but breaks isolation/trust assumptions for “developer-only” endpoints.

Fix

The fix for this vulnerability is to update to Ray 2.54.0 or higher.

Fix PR: https://github.com/ray-project/ray/pull/60526

Risk Scores
Base Score
5.9

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a low impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
5.4

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.26%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities

Browse More

Medium severity
Scan your project

Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.

Checkout DevGuard