Task Enumeration Vulnerability in Kanboard by Kanboard Project
CVE-2026-58660

7.2HIGH

Key Information:

Vendor

Kanboard

Status
Kanboard
Vendor
CVE Published:
15 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-58660?

A vulnerability exists in Kanboard's BoardAjaxController, where the save() method fails to properly validate task ownership during drag-and-drop operations. This allows authenticated users to manipulate tasks across different projects, even those they do not have direct access to. By exploiting the sequential nature of task IDs, users can enumerate and potentially corrupt or hide tasks from private projects, creating significant security and privacy risks within the Kanboard environment.

Affected Version(s)

kanboard 0 < 1.2.52

kanboard 564cc30e1e360959572e01e158734d9475c05903

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-2026-58660 - Proof of Concept

References

https://github.com/kanboard/kanboard/issues/5852
technical-descriptionexploit
https://github.com/kanboard/kanboard/pull/5853
issue-tracking
https://github.com/kanboard/kanboard/commit/564cc30e1e360...
patch

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
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

George Chen
.