Vulnerability · Published Nov 2, 2026 · Assigned by NLnet Labs
CVE-2026-109142Krill treats a "local parent" as already-authenticated, letting a CA operator act as any child of any CA on the same server
High 8.4
In plain English
A high-severity authorization bypass via user-controlled key in Krill from NLnet Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.3%top 79.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| NLnet Labs | Krill | see references |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
References
- https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.txt vendor-advisory