CWE-283
Unverified Ownership
The product does not properly verify that a critical resource is owned by the proper entity.
CVE-2026-44562 (GCVE-0-2026-44562)
Vulnerability from cvelistv5 – Published: 2026-05-15 19:30 – Updated: 2026-05-15 22:21
VLAI
Title
Open WebUI: Model Import Overwrites Any Model Without Ownership Check
Summary
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.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.9.0
|
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CVE-2026-44707 (GCVE-0-2026-44707)
Vulnerability from cvelistv5 – Published: 2026-05-26 17:10 – Updated: 2026-05-27 17:23
VLAI
Title
Chatwoot: Pre-Account Takeover via OAuth on Unconfirmed Accounts
Summary
Chatwoot is a customer engagement suite. From 2.14.0 to before 4.13.0, a Pre-Account Takeover (Pre-ATO) vulnerability existed in Chatwoot's authentication flow. Because email confirmation was not enforced before an account became usable, an attacker could pre-register an email address they did not own and set a password. If the legitimate owner of that email later signed in to Chatwoot using Google OAuth (or another OmniAuth provider), the OAuth flow silently confirmed the existing account without invalidating the attacker's pre-set credentials. The attacker could then continue to log in with the password they had originally chosen and access any data the victim subsequently entered into the dashboard, including PII, API keys, and other sensitive information. This vulnerability is fixed in 4.13.0.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/chatwoot/chatwoot/security/adv… | x_refsource_CONFIRM |
| https://github.com/chatwoot/chatwoot/pull/13878 | x_refsource_MISC |
| https://github.com/chatwoot/chatwoot/commit/211fb… | x_refsource_MISC |
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Mitigation ID: MIT-1
Phases: Architecture and Design, Operation
Description:
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Mitigation ID: MIT-49
Phase: Architecture and Design
Strategy: Separation of Privilege
Description:
- Consider following the principle of separation of privilege. Require multiple conditions to be met before permitting access to a system resource.
No CAPEC attack patterns related to this CWE.