| Title | YunaiV yudao-cloud up to 2026.01 Authentication Bypass by Primary Weakness |
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| Description | A critical authentication bypass vulnerability exists in yudao-cloud `OAuth2TokenServiceImpl.java`. The vulnerability allows an attacker to use a `refresh_token` directly as an `access_token` to authenticate API requests, effectively bypassing the intended access token authentication mechanism.
In the OAuth 2.0 authentication framework, `access_token` and `refresh_token` serve different purposes:
- **`access_token`**: Short-lived token used for API authentication
- **`refresh_token`**: Long-lived token used to obtain new access tokens
This vulnerability breaks the security separation between these two token types. |
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| Source | ⚠️ https://github.com/9str0IL/CVE/issues/1 |
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| User | 9str0il (UID 97218) |
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| Submission | 04/09/2026 11:11 (3 months ago) |
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| Moderation | 05/02/2026 10:39 (23 days later) |
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| Status | Accepted |
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| VulDB entry | 360832 [YunaiV yudao-cloud up to 2026.01 OAuth2TokenServiceImpl.java getAccessToken improper authentication] |
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| Points | 20 |
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