---
id: CVE-2026-109141
title: >-
  Krill users restricted to one CA can make any other CA delegate its prefixes
  and publish ROAs for them via bulk import
summary: >-
  The vulnerability gives a role that is restricted to a list of CAs (cas =
  [...]) its full permission set for every request that is not tied to a CA,
  including the bulk import endpoint POST /api/v1/bulk/cas/import. It adds a new
  child CA …
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L'
cvssSource: cna
cwe:
  - CWE-639
vendor: NLnet Labs
product: Krill
affected:
  - Krill (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-02T16:11:12.422396Z'
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T16:11:53.977Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-109141'
references:
  - url: 'https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109141.txt'
tags:
  - cve.org
epss: 0.00276
epssPercentile: 0.20152
ingestedAt: '2026-11-05T19:30:42.704Z'
---

## Overview

The vulnerability gives a role that is restricted to a list of CAs (cas = [...]) its full permission set for every request that is not tied to a CA, including the bulk import endpoint POST /api/v1/bulk/cas/import. It adds a new child CA under any existing CA, gives the child any of that CA's resources, and creates the ROAs given in the request

## Affected

- `Krill (all versions)`

## Remediation

This issue is fixed in 0.16.1 and all later versions.