# CVE-2026-109141: Krill users restricted to one CA can make any other CA delegate its prefixes and publish ROAs for them via bulk import

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

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

## Remediation

- fix: This issue is fixed in 0.16.1 and all later versions. (source: CNA: NLnet Labs)

## Affected products and versions

- NLnet Labs / Krill: ≥ 0.16.1; < * (unaffected, semver). Source: CNA: NLnet Labs

## Severity and prioritization

- CVSS 3.1: 8.4 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L; source: CNA: NLnet Labs

- CVSS 3.1: 8.4 (high); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L; source: NVD: sep@nlnetlabs.nl

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109141.txt (CNA: NLnet Labs; vendor-advisory)

- https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109141.txt (sep@nlnetlabs.nl)

## Provenance

- CNA: NLnet Labs: https://www.cve.org/CVERecord?id=CVE-2026-109141; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109141; retrieved 2026-11-02; source updated 2026-11-02

Revision: 1f898ce266902f9c01aa086d124de3a752b92b3b6332f467e7a972f0df9456cb

Canonical: https://y2.dev/cve/CVE-2026-109141

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.