CVE-2026-109140 json
Krill login-session tokens reuse their encryption nonce across restarts, so any user who can log in can forge an "admin" token
published 2026-11-02 7 d ago modified 2026-11-02 6 d ago also EUVD-2026-115255
- cvss
- 8.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- NLnet Labs Krill 0.16.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 d ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L |
Affected products
- NLnet Labs Krill
Classification
- Weakness
-
- CWE-323 Reusing a Nonce, Key Pair in Encryption
References
-
nlnetlabs.nl
/downloads/krill/CVE-2026-109140.txt
vendor-advisory
Sources
- CVE List CVE-2026-109140
- NVD CVE-2026-109140
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