CVE-2026-111702: ChatOllama through commit 96c3ce5 IDOR Exposes Private Knowledge Bases

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% 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

ChatOllama through commit 96c3ce5 contains an insecure direct object reference vulnerability that allows remote attackers to access other users' private knowledge bases by supplying sequential ids. Attackers can enumerate ids via GET /api/knowledgebases/{id} or the knowledgebaseId parameter of POST /api/models/chat to read metadata and retrieved document content.

References

https://github.com/sugarforever/chat-ollama/blob/6f4245a96b58ce8833a8c51d90d923b0e9814784/server/api/knowledgebases/%5Bid%5D.get.ts#L25-L34
https://github.com/sugarforever/chat-ollama/blob/6f4245a96b58ce8833a8c51d90d923b0e9814784/server/api/models/chat/index.post.ts#L392-L427
https://hackmd.io/@hieuPenguinnn/chat-ollama-knowledge-base-cross-user-idor
https://www.vulncheck.com/advisories/chatollama-through-commit-96c3ce5-idor-exposes-private-knowledge-bases
https://hackmd.io/@hieuPenguinnn/chat-ollama-knowledge-base-cross-user-idor

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