CVE-2026-72756 Routinator exits on malformed rsync URIs
High 7.5
Published
Updated
Check this codebase for CVE-2026-72756 and fix it if it is affected.
What it is: CVE-2026-72756 is a high-severity vulnerability in NLnet Labs Routinator, published on 26 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-72756 in the wild and no public exploit code.
Affected product: NLnet Labs Routinator. 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-2026-72756/ (Markdown: https://insights.sbomify.com/CVE-2026-72756/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-72756?
CVE-2026-72756 is a high-severity vulnerability in NLnet Labs Routinator, published on 26 Oct 2026.
Official description
Routinator exits when an rsync URI for a file obtained over RRDP contains a path that cannot be stored on disk, such as too long file names, and folder names that overlap with existing file names.
Weakness: CWE-755
Which versions are affected by CVE-2026-72756?
How do I fix CVE-2026-72756?
No fix has been published for CVE-2026-72756 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-72756 being exploited?
There is no known exploitation of CVE-2026-72756 in the wild and no public exploit code.
Sources
Also known as GHSA-m856-4mhh-5mgh.