Authorization Vulnerability in Camunda Engine REST Task Sub-Resources
CVE-2026-109431

8.6HIGH

Key Information:

Vendor: Camunda
Status: Camunda 7
Vendor: CVE Published:; 19 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-109431?

Authored in versions 7.24.0 through 7.24.14 and 7.23.0 through 7.23.17, this vulnerability in Camunda's engine REST API permits authenticated attackers lacking permission grants to access sensitive task comments and attachments. Attackers can exploit specific endpoints like getAttachment, getAttachmentData, deleteAttachment, and getComment using only known object IDs. This flaw arises from insufficient authorization checks on task sub-resources, which allows unauthorized actions such as reading, downloading, or permanently deleting these resources.

Affected Version(s)

Camunda 7 7.24.0 < 7.24.14

Camunda 7 7.23.0 < 7.23.17

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-2026-109431 - Proof of Concept