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Public vulnerability disclosure

CVE-2026-109083

Apache Syncope: Remote Code Execution via Flowable JUEL expression

publishedCWE-653

Improper isolation or compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements can import arbitrary BPMN process definitions via the REST API and then start the process. When a BPMN process containing a JUEL expression is imported and started, the expression is executed directly on the server, with no sandbox. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.8, from 4.1.0 through 4.1.3. Users are recommended to upgrade to version 4.0.9 / 4.1.4, which fix this issue by rejecting BPMN definitions including expression attributes.

Investigate in Cyber JSONMarkdown
Technical severityUnscoredNo score in collected sources
Published2026-11-02Source updated 2026-11-02
Collected2026-11-021 attributed source

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

ProductVersionsAuthority
Apache Syncope
Apache Software Foundation
org.apache.syncope.ext.flowable:syncope-ext-flowable-bpmn
maven 		≥ 3.0.0-M0; ≤ 3.0.16 (affected, semver)
≥ 4.0.0-M0; ≤ 4.0.8 (affected, semver)
≥ 4.1.0; ≤ 4.1.3 (affected, semver)
Other versions: unaffected 		CNA: apache

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

No CVSS assessment reported. An unscored record is not a low-severity determination.

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References