{"id":"CVE-2026-109140","title":"Krill login-session tokens reuse their encryption nonce across restarts, so any user who can log in can forge an \"admin\" token","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.","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","cvssSource":"cna","cwe":["CWE-323"],"vendor":"NLnet Labs","product":"Krill","affected":["Krill (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-11-02T16:12:47.575702Z"},"published":"2026-11-02","updated":"2026-11-02","sourceUpdated":"2026-11-02T16:12:58.713Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109140","references":[{"url":"https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109140.txt"}],"tags":["cve.org"],"epss":0.00309,"epssPercentile":0.23895,"ingestedAt":"2026-11-05T19:30:42.705Z","slug":"CVE-2026-109140","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `Krill (all versions)`\n\n## Remediation\n\nThis issue is fixed in 0.16.1 and all later versions.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}