Improper Authorization in jsbroks COCO Annotator Affects Remote Operations
CVE-2026-2109

5.3MEDIUM

Key Information:

Vendor

Jsbroks

Status
Coco Annotator
Vendor
CVE Published:
7 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2109?

A security flaw has been discovered in jsbroks COCO Annotator, specifically in the Delete Category Handler's undo function located at /api/undo/. This vulnerability allows unauthorized manipulation of the argument ID, potentially letting attackers perform unauthorized operations. The issue can be exploited remotely, creating significant security risks for affected users. Despite the disclosure of this vulnerability to the vendor, there has been no response, leaving users at potential risk. The exploit details are publicly available, indicating an urgent need for updates and mitigation strategies.

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Affected Version(s)

COCO Annotator 0.11.0

COCO Annotator 0.11.1

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-2026-2109 - Proof of Concept

References

https://vuldb.com/?id.344685
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344685
signaturepermissions-required
https://vuldb.com/?submit.745579
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
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

nmmorette (VulDB User)
JSON
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