CVE-2026-119552 Uptime Kuma through 2.5.8 Race Condition Admin Creation via Setup Handler
Medium 6.3
Published
Updated
Check this codebase for CVE-2026-119552 and fix it if it is affected.
What it is: CVE-2026-119552 is a medium-severity vulnerability in louislam uptime-kuma, published on 30 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-119552 in the wild and no public exploit code.
Affected product: louislam uptime-kuma. 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-2026-119552/ (Markdown: https://insights.sbomify.com/CVE-2026-119552/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-119552?
CVE-2026-119552 is a medium-severity vulnerability in louislam uptime-kuma, published on 30 Oct 2026.
Official description
Uptime Kuma through 2.5.8 contains a race condition in the Socket.IO first-run setup handler that allows unauthenticated attackers to create an additional administrator account. Attackers can send concurrent setup requests during the bcrypt hashing window to bypass the empty user table check, then modify monitors, API keys, and enable disableAuth.
Weakness: CWE-367
Which versions are affected by CVE-2026-119552?
How do I fix CVE-2026-119552?
No fix has been published for CVE-2026-119552 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-119552 being exploited?
There is no known exploitation of CVE-2026-119552 in the wild and no public exploit code.
Sources
Also known as GHSA-hpf4-7mjx-jmh4.