Auth bypass in Nduckmink Arkon
CVE-2026-111716
Arkon through 0.9.2 contains a broken access control vulnerability that allows authenticated employees to read and modify other departments' sources because by-id routes in app/routers/sources.py skip can_access_document. Attackers can call the plan, progress, PATCH, retry and approve-extraction routes with foreign source IDs to disclose derived wiki titles and summaries and alter ingestion state.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/arkon-wiki-graph-cross-department-idor (third-party-advisory)
- github.com/nduckmink/arkon/blob/v0.9.2/app/routers/sources.py (technical-description)
- github.com/nduckmink/arkon/blob/v0.9.2/app/routers/sources.py (technical-description)
- github.com/nduckmink/arkon/blob/v0.9.2/app/routers/sources.py (technical-description)
- VulnCheck Advisory: Arkon through 0.9.2 Broken Access Control via Sources By-ID Routes (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111716?
- CVE-2026-111716 is a medium-severity vulnerability in Nduckmink Arkon, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-10-16.
- How severe is CVE-2026-111716?
- Medium severity. CVSS v3 base score is 5.4 out of 10.