CVE-2026-109140
Krill login-session tokens reuse their encryption nonce across restarts, so any user who can log in can forge an "admin" token
The vulnerability is that Krill encrypts every login-session token with a nonce built from a counter that is reset to 0 on every Krill restart, so the same (key, nonce) pair is used again after each restart.
Fixes and workarounds
Fix
This issue is fixed in 0.16.1 and all later versions.
Source: CNA: NLnet LabsAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Krill NLnet Labs |
≥ 0.16.1; < * (unaffected, semver)
Other versions: affected |
CNA: NLnet Labs |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.4 high |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L | CNA: NLnet Labs |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109140.txtCNA: NLnet Labs · vendor-advisory
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