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TI-2026-83799 Aliases CVE-2026-109083GHSA-mvg9-v7rr-cqcg

Remote code execution in Apache Syncope via Flowable JUEL expression

Priority MEDIUM 49CWE-653Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Apache Syncope from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.8, and from 4.1.0 through 4.1.3 is affected. An administrator with adequate entitlements can import arbitrary BPMN process definitions through the REST API and start them. A JUEL expression in an imported process runs directly on the server without a sandbox, which is an improper isolation flaw (CWE-653).

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00519 44th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Syncope3.0.0-M0 – 3.0.16; 4.0.0-M0 – 4.0.8; 4.1.0 – 4.1.3—No fix listedCNA
  • Apache Syncope VendorApache Affected 3.0.0-M0 – 3.0.16; 4.0.0-M0 – 4.0.8; 4.1.0 – 4.1.3 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*——Apache
  • cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:* Versions — — ·Apache

Remediation

Upgrade to version 4.0.9 or 4.1.4, which reject BPMN definitions that include expression attributes. No fixed version is listed for the range from 3.0.0-M0 through 3.0.16.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-109083
  2. 2026-11-02 Alias added: GHSA-mvg9-v7rr-cqcg
  3. 2026-11-06 CVSS score added · CISA ADP
  4. 2026-11-06 CISA SSVC decision points changed
  5. 2026-11-06 Priority changed: LOW → MEDIUM

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences