CVE-2026-12887 In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the sc
Medium 5.1
Published
Updated
Check this codebase for CVE-2026-12887 and fix it if it is affected.
What it is: CVE-2026-12887 is a medium-severity vulnerability in Octopus Server, published on 27 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-12887 in the wild and no public exploit code.
Affected product: Octopus 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-2026-12887/ (Markdown: https://insights.sbomify.com/CVE-2026-12887/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-12887?
CVE-2026-12887 is a medium-severity vulnerability in Octopus Server, published on 27 Oct 2026.
Official description
In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the script executes outside of the parent directory.
Which versions are affected by CVE-2026-12887?
How do I fix CVE-2026-12887?
No fix has been published for CVE-2026-12887 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-12887 being exploited?
There is no known exploitation of CVE-2026-12887 in the wild and no public exploit code.
Sources
Also known as GHSA-7cvm-rc3q-qjrq.