CVE-2026-111716: Arkon through 0.9.2 Broken Access Control via Sources By-ID Routes

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-16 · updated 2026-10-16
Weakness: CWE-639

Description

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.

Affected products

nduckmink arkon: through 0.9.2

References

https://github.com/nduckmink/arkon/blob/v0.9.2/app/routers/sources.py#L257-L275
https://github.com/nduckmink/arkon/blob/v0.9.2/app/routers/sources.py#L295-L312
https://github.com/nduckmink/arkon/blob/v0.9.2/app/routers/sources.py#L644-L673
https://hackmd.io/@hieuPenguinnn/arkon-wiki-graph-cross-department-idor
https://www.vulncheck.com/advisories/arkon-through-0.9.2-broken-access-control-via-sources-by-id-routes

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