CVE-2026-110775
Nexent through 2.7.0 Cross-Tenant Knowledge-Base File Read via check_file_access
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 14, 2026
- Updated
- Oct 16, 2026
- Reserved
- Oct 14, 2026
Description
Nexent through 2.7.0 contains a missing authorization vulnerability in check_file_access that allows authenticated users to read other tenants' knowledge-base files by skipping tenant comparison for knowledge_base/ reads. Attackers in multi-tenant deployments can list objects via GET /file/storage for presigned URLs or use GET /file/download/{object_name} to download other tenants' source documents.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
nexentModelEngine-Group |
|
References
- https://hackmd.io/@hieuPenguinnn/nexent-knowledge-base-cross-tenant-file-readtechnical-descriptionexploit
- https://github.com/ModelEngine-Group/nexent/blob/90bf1a5dbb1eb16bb4a28c2407ed4b6eda9a09bf/backend/services/file_management_service.py#L177technical-description
- https://github.com/ModelEngine-Group/nexentproduct
- VulnCheck Advisory: Nexent through 2.7.0 Cross-Tenant Knowledge-Base File Read via check_file_accessthird-party-advisory
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