CVE-2026-116367 DeepSeek Harness sandbox.ts createContext
Medium 5.3
Published
Updated
Check this codebase for CVE-2026-116367 and fix it if it is affected.
What it is: CVE-2026-116367 is a medium-severity vulnerability in DeepSeek Harness, published on 26 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-116367 in the wild and no public exploit code.
Affected product: DeepSeek Harness. 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-2026-116367/ (Markdown: https://insights.sbomify.com/CVE-2026-116367/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116367?
CVE-2026-116367 is a medium-severity vulnerability in DeepSeek Harness, published on 26 Oct 2026.
Official description
A vulnerability was found in DeepSeek Harness up to 0.1.0-rc.5. This vulnerability affects the function createContext of the file packages/extensions/cordis-host-runner/src/sandbox.ts. The manipulation results in sandbox issue. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-116367?
How do I fix CVE-2026-116367?
No fix has been published for CVE-2026-116367 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116367 being exploited?
There is no known exploitation of CVE-2026-116367 in the wild and no public exploit code.
Sources
Also known as GHSA-87qr-qp63-3pcq.