CVE-2026-109141 Details
Description
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
A vulnerability in Krill versions prior to and including 0.16.0 allows users with a role restricted to specific Certificate Authorities (CAs) to misuse their permissions. These users can make requests that are not tied to a specific CA, including the bulk import endpoint for CA resources. This exploitation adds a new child CA under any existing CA, allocates resources from the parent CA to the child, and creates Route Origin Authorizations (ROAs) based on the imported data. As a result, the affected user can delegate prefixes and publish ROAs for them, effectively bypassing CA restrictions.
Users are advised to upgrade to Krill version 0.16.1 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 2, 2026CISA-ADP
Assessed Nov 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109141.txt | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| NLnet Labs Krill | <= 0.16.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 2, 2026 | CVE Modified | CISA-ADP |
| Nov 2, 2026 | New CVE Received | [email protected] |