CVE-2026-118690 Signal K Server before 2.33.0 Missing Authentication via /skServer/ziplogs
Critical 9.3
Published
Updated
Check this codebase for CVE-2026-118690 and fix it if it is affected.
What it is: CVE-2026-118690 is a critical vulnerability in signalk-server, published on 28 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-118690 in the wild and no public exploit code.
Affected product: signalk-server. 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-2026-118690/ (Markdown: https://insights.sbomify.com/CVE-2026-118690/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-118690?
CVE-2026-118690 is a critical vulnerability in signalk-server, published on 28 Oct 2026.
Official description
Signal K Server before 2.33.0 contains a missing authentication vulnerability that allows unauthenticated remote attackers to download log archives via the /skServer/ziplogs endpoint. Attackers can extract the JWT secretKey from security.json in the ZIP, forge administrator tokens, and create persistent admin accounts for full server control.
Weakness: CWE-306
Which versions are affected by CVE-2026-118690?
How do I fix CVE-2026-118690?
No fix has been published for CVE-2026-118690 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-118690 being exploited?
There is no known exploitation of CVE-2026-118690 in the wild and no public exploit code.
Sources
Also known as GHSA-4r6j-f6gv-fqcx, GHSA-4w32-qx5g-cpwv.