CVE-2026-89409 Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes
Medium 5.3
Published
Updated
Check this codebase for CVE-2026-89409 and fix it if it is affected.
What it is: CVE-2026-89409 is a medium-severity vulnerability in Silicon Labs Z-Wave SDK, published on 22 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-89409 in the wild and no public exploit code.
Affected product: Silicon Labs Z-Wave SDK. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-89409/ (Markdown: https://insights.sbomify.com/CVE-2026-89409/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-89409?
CVE-2026-89409 is a medium-severity vulnerability in Silicon Labs Z-Wave SDK, published on 22 Oct 2026.
Official description
In Z-Wave SDK 8.1.1 and earlier (for 700/800 series devices) and 6.85.02 and earlier (for 500 series devices), missing checks in the ZWAVE_CMD_NODES_EXIST handler can result in nodes being removed from the network. These messages must come from a device that has already joined the network.
Weakness: CWE-940
Which versions are affected by CVE-2026-89409?
How do I fix CVE-2026-89409?
No fix has been published for CVE-2026-89409 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-89409 being exploited?
There is no known exploitation of CVE-2026-89409 in the wild and no public exploit code.
Sources
Also known as GHSA-w9rg-jqqv-77wp.