CVE-2026-111715: Arkon through 0.9.2 Missing Authorization via Wiki Graph Neighborhood API

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-16 · updated 2026-10-19
Weakness: CWE-639

Description

Arkon through 0.9.2 contains a missing authorization vulnerability in GET /api/wiki/graph that lets authenticated employees read other departments' wiki metadata by supplying a foreign slug. Attackers with only wiki:read:own_dept permission can query get_neighborhood() without scope checks to obtain page slugs, titles, types and link edges up to depth 3.

Affected products

nduckmink arkon: through 0.9.2

References

https://github.com/nduckmink/arkon/blob/v0.9.2/app/routers/wiki.py#L621-L633
https://github.com/nduckmink/arkon/blob/v0.9.2/app/services/wiki_service.py#L200-L257
https://hackmd.io/@hieuPenguinnn/arkon-wiki-graph-cross-department-idor
https://www.vulncheck.com/advisories/arkon-through-0.9.2-missing-authorization-via-wiki-graph-neighborhood-api
https://hackmd.io/@hieuPenguinnn/arkon-wiki-graph-cross-department-idor

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