Signal K Server Vulnerable to Denial of Service via Unrestricted Access Request Flooding

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

• CVE-2025-68272: 0.56% estimated exploitation activity in the next 30 days; percentile 46.91 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary A Denial of Service (DoS) vulnerability allows an unauthenticated attacker to crash the SignalK Server by flooding the access request endpoint (/signalk/v1/access/requests). This causes a "JavaScript heap out of memory" error due to unbounded in-memory storage of request objects. Details The vulnerability is caused by a lack of rate limiting and improper memory management for incoming access requests. Vulnerable Code Analysis: 1. In-Memory Storage: In src/requestResponse.js, requests are stored in a simple JavaScript object: 2. Unbounded Growth: The createRequest function adds new requests to this object without checking the current size or count of existing requests. 3. Infrequent Pruning: The pruneRequests function, which removes old requests, runs only once every 15 minutes (pruneIntervalRate). 4. No Rate Limiting: The endpoint /signalk/v1/access/requests accepts POST requests from any client without any rate limiting or authentication (by design, as it's for initial…

Published by the source

2 Jan 2026, 15:20 UTC

Last modified by the source

27 Apr 2026, 11:41 UTC

Source last checked

26 Oct 2026, 12:51 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-7rqc-ff8m-7j23

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-7rqc-ff8m-7j23

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# Patch Next advisory brief: CVE-2025-68272

Advisory: Signal K Server Vulnerable to Denial of Service via Unrestricted Access Request Flooding
IDs: CVE-2025-68272, GHSA-7rqc-ff8m-7j23
Record: https://patchnext.com/advisories/cve-2025-68272 (revision 2, source checked 26 Oct 2026, 12:51 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: signalk-server 2.19.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm signalk-server: affected < 2.19.0; fixed in 2.19.0

## Suggested inspection (read-only)
- `npm ls signalk-server --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on signalk-server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-7rqc-ff8m-7j23 (OSV record GHSA-7rqc-ff8m-7j23 lists affected ranges: npm signalk-server >=0 <2.19.0 (fixed))
- Verified: https://github.com/advisories/GHSA-7rqc-ff8m-7j23 (GitHub-reviewed advisory GHSA-7rqc-ff8m-7j23 lists affected ranges: npm signalk-server >=0 <2.19.0)

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