XXE in Flowable Flowable-Engine
CVE-2026-91197
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.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/flowable/flowable-engine/issues/4216 (issue-tracking)
- github.com/flowable/flowable-engine (product)
- github.com/flowable/flowable-engine/blob/0779d68e5a3385b74d8acb8bc37901ff545132… (technical-description)
- github.com/flowable/flowable-engine/blob/0779d68e5a3385b74d8acb8bc37901ff545132… (technical-description)
- www.vulncheck.com/advisories/flowable-flowable-engine-through-8.0.0-xxe-via-pro… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91197?
- CVE-2026-91197 is a medium-severity vulnerability in Flowable Flowable-Engine, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.5/10. Published 2026-09-14.
- How severe is CVE-2026-91197?
- Medium severity. CVSS v3 base score is 6.5 out of 10.