---
id: CVE-2026-111363
title: BISHENG through 3.0.0-beta4 IDOR via /api/v1/knowledge/file_bbox
summary: >-
  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 se…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-639
vendor: dataelement
product: bisheng
affected:
  - bisheng <= 3.0.0-beta4
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T21:43:47.748Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111363'
references:
  - url: >-
      https://hackmd.io/@hieuPenguinnn/bisheng-knowledge-file-bbox-cross-user-idor
  - url: >-
      https://github.com/dataelement/bisheng/blob/v3.0.0-beta4/src/backend/bisheng/knowledge/api/endpoints/knowledge.py#L663-L670
  - url: >-
      https://github.com/dataelement/bisheng/blob/v3.0.0-beta4/src/backend/bisheng/knowledge/domain/services/knowledge_service.py#L2523-L2533
  - url: 'https://github.com/dataelement/bisheng'
  - url: >-
      https://www.vulncheck.com/advisories/bisheng-through-3.0.0-beta4-idor-via-api-v1-knowledge-file-bbox
    label: >-
      VulnCheck Advisory: BISHENG through 3.0.0-beta4 IDOR via
      /api/v1/knowledge/file_bbox
tags:
  - cve.org
ingestedAt: '2026-10-15T22:48:25.457Z'
---

## Overview

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

- `bisheng <= 3.0.0-beta4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.