Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck

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

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in bisheng from dataelement. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 76.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
dataelement	bisheng	0 – through 3.0.0-beta4

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/bisheng-knowledge-file-bbox-cross-user-idor third-party-advisory
https://github.com/dataelement/bisheng/blob/v3.0.0-beta4/src/backend/bisheng/knowledge/api/endpoints/knowledge.py#L663-L670 technical-description
https://github.com/dataelement/bisheng/blob/v3.0.0-beta4/src/backend/bisheng/knowledge/domain/services/knowledge_service.py#L2523-L2533 technical-description
https://github.com/dataelement/bisheng product
VulnCheck Advisory: BISHENG through 3.0.0-beta4 IDOR via /api/v1/knowledge/file_bbox third-party-advisory