CVE-2026-50891 Filestash allows attackers to escalate privileges via sending a crafted request
High 8.1
Published
Updated
Check this codebase for CVE-2026-50891 and fix it if it is affected.
What it is: CVE-2026-50891 is a high-severity vulnerability in n/a, published on 15 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50891 exists.
Affected packages and fixed versions:
- github.com/mickael-kerjean/filestash (Go): affected all versions; no fix listed
- github.com/mickael-kerjean/filestash (Go): affected all versions up to 0.2.2-0.20260827111952-cbcd1e96ebc7; no fix listed
- github.com/mickael-kerjean/filestash (Go): affected all versions up to 0.2.2-0.20260827111952-cbcd1e96ebc7; no fix listed
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-2026-50891/ (Markdown: https://insights.sbomify.com/CVE-2026-50891/index.md)
Attackers can escalate privileges by sending crafted requests to the admin API config endpoint in Filestash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50891?
CVE-2026-50891 is a high-severity vulnerability in n/a, published on 15 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Incorrect access control in the /admin/api/config component of Filestash v0.4.0 allows attackers to escalate privileges via sending a crafted request.
Weakness: CWE-284
Which versions are affected by CVE-2026-50891?
3 open source packages ship an affected version, including github.com/mickael-kerjean/filestash.
| Package | Affected | Fixed in |
|---|---|---|
github.com/mickael-kerjean/filestash Go | All versions | None |
github.com/mickael-kerjean/filestash Go | All versions to 0.2.2-0.20260827111952-cbcd1e96ebc7 | None |
github.com/mickael-kerjean/filestash Go | All versions to 0.2.2-0.20260827111952-cbcd1e96ebc7 | None |
How do I fix CVE-2026-50891?
Upgrade to a fixed version.
Is CVE-2026-50891 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50891 exists.
Sources
Also known as GHSA-rcqf-cpv9-g5jf, GO-2026-6300.