---
title: "CVE-2026-109142: Krill - Broken Access Control"
description: "Krill contains a broken access control vulnerability caused by in-process RFC 6492 provisioning exchange trusting unverified child identity, letting attackers impersonate child CAs, exploit requires parent and child CAs on the same server."
url: https://panop.io/threat-heartbeat/CVE-2026-109142/
---

# CVE-2026-109142 Krill - Broken Access Control

Krill contains a broken access control vulnerability caused by in-process RFC 6492 provisioning exchange trusting unverified child identity, letting attackers impersonate child CAs, exploit requires parent and child CAs on the same server.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-109142)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

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

Published

2 November 2026

Updated

3 November 2026

Weakness

[CWE-639](https://cwe.mitre.org/data/definitions/639.html)

## Vendor fix

Update to the latest version with proper child identity verification.

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-2026-109142](https://nvd.nist.gov/vuln/detail/CVE-2026-109142)
- [https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.txt](https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.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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