CVE-2026-111363: BISHENG through 3.0.0-beta4 IDOR via /api/v1/knowledge/file_bbox

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-15 · updated 2026-10-16
Weakness: CWE-639

Description

BISHENG through 3.0.0-beta4 contains an insecure direct object reference vulnerability that allows authenticated low-privileged users to read other users' parsed documents by supplying arbitrary file_id values. Attackers can enumerate sequential file ids against GET /api/v1/knowledge/file_bbox to retrieve extracted page text from other users' and tenants' knowledge bases.

Affected products

dataelement bisheng: through 3.0.0-beta4

References

https://github.com/dataelement/bisheng
https://github.com/dataelement/bisheng/blob/v3.0.0-beta4/src/backend/bisheng/knowledge/api/endpoints/knowledge.py#L663-L670
https://github.com/dataelement/bisheng/blob/v3.0.0-beta4/src/backend/bisheng/knowledge/domain/services/knowledge_service.py#L2523-L2533
https://hackmd.io/@hieuPenguinnn/bisheng-knowledge-file-bbox-cross-user-idor
https://www.vulncheck.com/advisories/bisheng-through-3.0.0-beta4-idor-via-api-v1-knowledge-file-bbox
https://hackmd.io/@hieuPenguinnn/bisheng-knowledge-file-bbox-cross-user-idor

Get alerted when CVE-2026-111363 or the next vulnerability affects your stack