XML External Entity Injection in Flowable Engine by Flowable
CVE-2026-91197

7.1HIGH

Key Information:

Vendor

Flowable

Status
Flowable-engine
Vendor
CVE Published:
14 September 2026

What is CVE-2026-91197?

Flowable engine up to version 8.0.0 contains a vulnerability in the ProcessDiagramLayoutFactory.parseXml() method that allows attackers with deployment privileges to exploit XML external entity injection. This occurs because the engine fails to disable external entity resolution while parsing BPMN files. Malicious actors can incorporate DOCTYPE declarations to access local files or initiate requests to internal network resources, potentially compromising sensitive data and infrastructure.

Affected Version(s)

flowable-engine 0 <= 8.0.0

References

https://github.com/flowable/flowable-engine/issues/4216
issue-tracking
https://github.com/flowable/flowable-engine
product
https://github.com/flowable/flowable-engine/blob/0779d68e...
technical-description

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.