---
title: "CVE-2026-72756: Routinator - Denial of Service"
description: "Routinator contains a denial of service caused by handling rsync URIs with paths that are too long or overlap with existing file names, letting attackers cause application exit, exploit requires crafted RRDP data."
url: https://panop.io/threat-heartbeat/CVE-2026-72756/
---

# CVE-2026-72756 Routinator - Denial of Service

Routinator contains a denial of service caused by handling rsync URIs with paths that are too long or overlap with existing file names, letting attackers cause application exit, exploit requires crafted RRDP data.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-72756)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-755](https://cwe.mitre.org/data/definitions/755.html)

## Vendor fix

Update to the latest version with fixes for path handling in rsync URIs.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-72756](https://nvd.nist.gov/vuln/detail/CVE-2026-72756)
- [https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt](https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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