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

Published Nov 2, 2026 CVSS 3.1 · 8.4 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

This issue is fixed in 0.16.1 and all later versions.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Nlnetlabs
Nlnetlabs krill
Vendors & Products Nlnetlabs
Nlnetlabs krill
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Krill login-session tokens reuse their encryption nonce across restarts, so any user who can log in can forge an "admin" token
Weaknesses CWE-323
References
Metrics cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
NLnet Labs
Published
Updated
Nov 2, 2026, 4:12 PM
Reserved
Oct 12, 2026, 11:22 AM
Status
Deferred
Published
Nov 2, 2026, 4:17 PM
Modified
Nov 2, 2026, 7:35 PM