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.

CVSS 4.0

7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-25)

CWE

CWE-639

Published

2026-10-14

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

References

• https://github.com/ModelEngine-Group/nexent
• https://github.com/ModelEngine-Group/nexent/blob/90bf1a5dbb1eb16bb4a28c2407ed4b6eda9a09bf/backend/services/file_management_service.py#L177
• https://hackmd.io/@hieuPenguinnn/nexent-knowledge-base-cross-tenant-file-read
• https://www.vulncheck.com/advisories/nexent-through-2.7.0-cross-tenant-knowledge-base-file-read-via-check-file-access

Check your stackJSON