Improperly Controlled Modification of Dynamically-Determined Object Attributes Affecting open-webui package, versions [0.3.33,0.9.5)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 May 2026
- disclosed14 May 2026
- credityantongggg
Introduced: 14 May 2026
NewCVE-2026-45396 (opens in a new tab)How to fix?
Upgrade open-webui to version 0.9.5 or higher.
Overview
open-webui is an Open WebUI
Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes through the FeedbackForm and insert_new_feedback paths in backend/open_webui/models/feedbacks.py. An attacker can forge feedback attribution by sending a POST /api/v1/evaluations/feedback request with client-supplied user_id, id, or version fields that are accepted into the form and then written into the new record. This lets a regular authenticated user submit feedback on behalf of another user, corrupting the evaluation leaderboard and causing admin feedback exports and listings to show spoofed ownership.