Improper Access Control in Doccano Open Source Annotation Tools for Machine Learning
CVE-2026-82833

5.3MEDIUM

Key Information:

Vendor

Doccano

Status
Open Source Annotation Tools For Machine Learning Practitioners
Auto Labeling Pipeline Module To Annotate A Document Automatically
Vendor
CVE Published:
31 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82833?

A vulnerability exists in Doccano Open Source Annotation Tools that affects the Project Example Detail Endpoint in versions up to 1.8.5. This flaw allows unauthorized access due to improper access controls in the ExampleDetail function of the endpoint located at /v1/projects/1/examples/. Given that the exploit is publicly available, it poses a significant risk, as attackers may launch remote exploitation attempts. Despite early notifications to the vendor about this issue, there has been no response or remediation action taken.

Affected Version(s)

Auto Labeling Pipeline Module to Annotate a Document Automatically 1.8.0

Auto Labeling Pipeline Module to Annotate a Document Automatically 1.8.1

Auto Labeling Pipeline Module to Annotate a Document Automatically 1.8.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82833 - Proof of Concept

References

https://vuldb.com/vuln/397245
vdb-entrytechnical-description
https://vuldb.com/vuln/397245/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82833
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Stephen Lin (VulDB User)
VulDB CNA Team
.