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No exploitation reportedAwaiting NVD analysis

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

No exploitation reported by the sources we read.

  • Published2026-11-02
  • WeaknessCWE-323

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-11-0215:41CVE publishedCNA

Observed activity

isMalicious corpus · updated 2026-11-02 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-109140?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-109140?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

Products declared by the CNA

As NLnet Labs, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • NLnet Labs Krillother versions: affected

    Not affected ≥ 0.16.1

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-02

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-109140 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE record2026-11-02
  • CISA-ADPSSVC decisionnone2026-11-02
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.18.42026-11-02
  • CNAweakness (CWE)CWE-3232026-11-02

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Published
2026-11-02

Frequently asked questions

What is CVE-2026-109140?

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.

Is CVE-2026-109140 actively exploited?

Active exploitation of CVE-2026-109140 has not been confirmed.

What is the CVSS score for CVE-2026-109140?

CVE-2026-109140 has a CVSS v3 base score of 8.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L.

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