Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110775Nexent through 2.7.0 Cross-Tenant Knowledge-Base File Read via check_file_access

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in nexent from ModelEngine-Group. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 83.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
ModelEngine-Group	nexent	0 – through 2.7.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

https://hackmd.io/@hieuPenguinnn/nexent-knowledge-base-cross-tenant-file-read technical-description, exploit
https://github.com/ModelEngine-Group/nexent/blob/90bf1a5dbb1eb16bb4a28c2407ed4b6eda9a09bf/backend/services/file_management_service.py#L177 technical-description
https://github.com/ModelEngine-Group/nexent product
VulnCheck Advisory: Nexent through 2.7.0 Cross-Tenant Knowledge-Base File Read via check_file_access third-party-advisory