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Details of issue NIXPKGS-2026-1618

NIXPKGS-2026-1618
published on
Permalink CVE-2026-44562
6.5 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): Low (L)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): High (H)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): Low (L)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): None (N)
updated 1 week, 2 days ago by @LeSuisse Activity log
  • Created suggestion 1 week, 2 days ago
  • @LeSuisse accepted 1 week, 2 days ago
  • @LeSuisse published on GitHub 1 week, 2 days ago
Open WebUI: Model Import Overwrites Any Model Without Ownership Check

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the POST /api/v1/models/import endpoint allows users with the workspace.models_import permission to overwrite any existing model in the database, regardless of ownership. When an imported model's ID matches an existing model, the endpoint merges the attacker's payload over the existing model data and writes it to the database with no ownership or access grant validation. Additionally, filter_allowed_access_grants is never called, bypassing the access grant restrictions enforced on all other model mutation endpoints. This vulnerability is fixed in 0.9.0.

Affected products

open-webui
  • ==< 0.9.0

Matching in nixpkgs

pkgs.open-webui

Comprehensive suite for LLMs with a user-friendly WebUI

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