{"id":"CVE-2026-111717","kind":"vulnerability","aliases":["CVE-2026-111717"],"related":[],"title":"Arkon: skill version list leaks other departments' metadata to employees","description":"Arkon through 0.9.2 contains a missing authorization vulnerability in list_skill_versions that allows authenticated employees to read other departments' skill version metadata by bypassing the can_access_skill check. Attackers holding the default skill:read permission can request GET /api/skills/{slug}/versions for another department's skill to obtain version numbers, hashes, storage paths and changelogs.","summary":"Arkon through 0.9.2 fails to check department access in the list_skill_versions endpoint, so any authenticated employee can list version metadata for skills owned by other departments. Exposed fields include version numbers, hashes, storage paths and changelogs.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ai-tooling","arkon","multi-tenant","self-hosted"],"not_affected_if":["no-skill-sharing","single-department"],"how_to_check":"- Check the installed Arkon version; `unknown` whether it is 0.9.2 or earlier from the sources alone\n- Review whether the GET /api/skills/{slug}/versions route applies the can_access_skill check (`unknown` from the sources)","fix":"- Upgrade Arkon past `0.9.2` once a fixed release is published (fixed version: unknown from the sources)\n- Until then, restrict the skill:read permission to trusted roles (unknown from the sources)","status":"open","published_at":"2026-10-16T18:17:56+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","triaged_at":"2026-10-25T04:27:01+00:00","updated_at":"2026-10-25T04:27:01+00:00","category":"ai-tooling","confidence":0.6,"triage":{"at":"2026-10-25T04:27:01Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Arkon past `0.9.2` once a fixed release is published (fixed version: unknown from the sources)\n- Until then, restrict the skill:read permission to trusted roles (unknown from the sources)","reach":"network","title":"Arkon: skill version list leaks other departments' metadata to employees","impact":"low","summary":"Arkon through 0.9.2 fails to check department access in the list_skill_versions endpoint, so any authenticated employee can list version metadata for skills owned by other departments. Exposed fields include version numbers, hashes, storage paths and changelogs.","category":"ai-tooling","nicknames":[],"who_cares":["arkon","self-hosted","multi-tenant"],"confidence":0.6,"needs_auth":"yes","worst_case":"Authenticated employees read other departments' skill version metadata and hashes.","analyst_note":"Confirm the fixed Arkon version and whether the endpoint check was patched; the NVD entry alone gives no fix or check details.","how_to_check":"- Check the installed Arkon version; `unknown` whether it is 0.9.2 or earlier from the sources alone\n- Review whether the GET /api/skills/{slug}/versions route applies the can_access_skill check (`unknown` from the sources)","needs_analyst":true,"not_affected_if":["single-department","no-skill-sharing"],"who_is_affected":"Teams running Arkon up to and including 0.9.2 with more than one department sharing skills on the same instance. Single-department deployments see little difference because the leak is cross-department. Deployments that do not use multi-department skill separation can skip it.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000631,"input_tokens":3349,"output_tokens":592,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-111717':13A,16A '-2026':12A,15A '/api/skills':105C '/versions':107C '0.9.2':29B,67C 'access':34B,92C 'ai':18B 'ai-tool':17B 'allow':78C 'anoth':109C 'arkon':1A,20B,27B,65C 'attack':95C 'authent':43B,79C 'author':71C 'bypass':89C 'changelog':64B,121C 'check':32B,94C 'contain':68C 'cve':11A,14A 'default':98C 'depart':7A,33B,54B,84C,110C 'employe':10A,44B,80C 'endpoint':40B 'expos':55B 'fail':30B 'field':56B 'get':104C 'hash':60B,117C 'hold':96C 'host':26B 'includ':57B 'leak':5A 'list':4A,37B,46B,74C 'metadata':8A,48B,87C 'miss':70C 'multi':22B 'multi-ten':21B 'number':59B,116C 'obtain':114C 'own':51B 'path':62B,119C 'permiss':101C 'read':82C,100C 'request':103C 'self':25B 'self-host':24B 'skill':2A,38B,50B,75C,85C,93C,99C,112C 'slug':106C 'storag':61B,118C 'tenant':23B 'tool':19B 'version':3A,39B,47B,58B,76C,86C,115C 'vulner':72C","nicknames":[],"mitigations":[],"who_affected":"Teams running Arkon up to and including 0.9.2 with more than one department sharing skills on the same instance. Single-department deployments see little difference because the leak is cross-department. Deployments that do not use multi-department skill separation can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T18:17:56+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111717","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111717","severity":null,"published_at":"2026-10-16T18:17:56+00:00","modified_at":"2026-10-16T19:17:05+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","fetched_at":"2026-10-23T22:28:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}