Quick answers
- Is CVE-2026-109141 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-109141 being exploited in the wild.
- How severe is CVE-2026-109141?
- High severity, with a CVSS score of 8.4, published 2 November 2026.
- Which products and versions are affected?
- NLnet Labs Krill up to and including 0.16.0.
- Is there a fix for CVE-2026-109141?
- Yes: fixed in Krill 0.16.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-109141 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-109141?
- Check whether you run NLnet Labs Krill at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: Krill 0.16.1
Technical details
The vulnerability exists in the bulk import endpoint POST /api/v1/bulk/cas/import, which applies full permissions to CA-restricted roles for requests not explicitly tied to a CA. An unauthenticated or low-privileged attacker can add a child CA under any existing CA, inherit that CA's resources, and create ROAs (Route Origin Authorizations) for arbitrary IP prefixes via the bulk import API.
Affected products
- NLnet Labs Krill up to and including 0.16.0
Timeline
- 2026-11-02: disclosed