What’s Vulnerable › Vulnerabilities
CVE-2026-44554: Open WebUI: Knowledge Base Destruction and RAG Poisoning via Unauthorized Collection Overwrite
- Severity: high (CVSS 8.1 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: yes
- Published: 2026-05-15 · updated 2026-06-17
- Weakness: CWE-862
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the POST /api/v1/retrieval/process/web endpoint accepts a user-supplied collection_name and an overwrite query parameter (default: True). It performs no authorization check on whether the calling user owns or has write access to the target collection. When overwrite=True, save_docs_to_vector_db calls VECTOR_DB_CLIENT.delete_collection() on the target collection before writing new content. This vulnerability is fixed in 0.9.0.
Affected products
- open-webui: before 0.9.0 — fixed in 0.9.0
How to fix
Upgrade to a fixed version: open-webui 0.9.0. Check the vendor advisory for mitigations.
References
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