Auth bypass in Modelengine-Group Nexent
CVE-2026-110775
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/nexent-knowledge-base-cross-tenant-file-read (technical-description, exploit)
- github.com/ModelEngine-Group/nexent/blob/90bf1a5dbb1eb16bb4a28c2407ed4b6eda9a09… (technical-description)
- github.com/ModelEngine-Group/nexent (product)
- www.vulncheck.com/advisories/nexent-through-2.7.0-cross-tenant-knowledge-base-f… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110775?
- CVE-2026-110775 is a medium-severity vulnerability in Modelengine-Group Nexent, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-10-14.
- How severe is CVE-2026-110775?
- Medium severity. CVSS v3 base score is 6.5 out of 10.