CVE-2026-91197Network attack vectorHinoki check available

File disclosure and SSRF via unsafe diagram parsing

Published Sep 14, 2026 · Updated Sep 14, 2026

XXE in Flowable Engine through 8.0.0 allows remote authenticated users to read local files or access internal endpoints via crafted BPMN XML. ProcessDiagramLayoutFactory.parseXml() parses stored BPMN bytes with a default DocumentBuilderFactory that permits DTD processing and external entity resolution. Process deployment privileges are required, and diagram-layout computation resolves the entity even when safe BPMN XML handling is enabled elsewhere.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

XXE in Flowable Engine through 8.0.0 allows remote authenticated users to read local files or access internal endpoints via crafted BPMN XML. ProcessDiagramLayoutFactory.parseXml() parses stored BPMN bytes with a default DocumentBuilderFactory that permits DTD processing and external entity resolution. Process deployment privileges are required, and diagram-layout computation resolves the entity even when safe BPMN XML handling is enabled elsewhere.

The record

CVE
CVE-2026-91197
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Flowable
Product
Flowable Engine
Classifications
T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=8.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Flowable · Flowable Engineversion=0 <=8.0.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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