CVE-2026-91197: Flowable Flowable-Engine

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Flowable flowable-engine through 8.0.0 contains an XML external entity injection vulnerability in ProcessDiagramLayoutFactory.parseXml() that fails to disable external entity resolution when parsing deployed BPMN resources. Attackers with process deployment privileges can embed DOCTYPE declarations with external entities in BPMN files to read arbitrary local files or trigger requests to internal network endpoints when diagram layout is computed.

Affected products

• Flowable Flowable-Engine: up to and including 8.0.0

Published 2026-09-14. Last modified 2026-09-24.