---
id: CVE-2026-72752
title: Routinator exits when requesting the output repeatedly
summary: >-
  Routinator runs out of memory when the JSON output is requested many times
  concurrently. This condition can be triggered maliciously by an attacker by
  opening a large number of connections to the HTTP server. Additionally
  Routinator runs…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-755
vendor: NLnet Labs
product: Routinator
affected:
  - Routinator (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-26T17:47:18.784341Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T17:57:34.344Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72752'
references:
  - url: 'https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72752.txt'
tags:
  - cve.org
ingestedAt: '2026-10-26T17:33:33.058Z'
epss: 0.00241
epssPercentile: 0.15117
---

## Overview

Routinator runs out of memory when the JSON output is requested many times concurrently. This condition can be triggered maliciously by an attacker by opening a large number of connections to the HTTP server. Additionally Routinator runs into a stack overflow and exits when a payload item with too much metadata is discarded at once.

This only affects users that make their HTTP or RTR server available to untrusted networks.

## Affected

- `Routinator (all versions)`

## Remediation

This issue is fixed in 0.15.3 and all later versions.