---
id: CVE-2026-72758
title: Routinator may exit on malformed ranges
summary: >-
  When parsing an AS range in Routinator, if the maximum value of the range is
  smaller than the minimum value of the range, Routinator will never reach the
  maximum value and run out of memory.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/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: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-26T17:46:28.407742Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T17:57:33.250Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72758'
references:
  - url: 'https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt'
tags:
  - cve.org
ingestedAt: '2026-10-26T17:33:33.056Z'
epss: 0.00397
epssPercentile: 0.33781
---

## Overview

When parsing an AS range in Routinator, if the maximum value of the range is smaller than the minimum value of the range, Routinator will never reach the maximum value and run out of memory.

## Affected

- `Routinator (all versions)`

## Remediation

This issue is fixed in 0.15.3 and all later versions.