Secuno
ENNL
Book demo

CVE-2026-53405

Apache Syncope vulnerability

9.8 CRITICALEPSS 0.75%
  1. Published20 Jul 2026

Description

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 Groovy scriptTask is imported and started, the Groovy script 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 4.0.6, from 4.1.0-M0 through 4.1.1. Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by wrapping Flowable's Groovy scriptTasks with security sandbox.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Apache Syncope≥ 3.0.0 ≤ 3.0.16 · ≥ 4.0.0 < 4.0.7 · ≥ 4.1.0 < 4.1.2

Remediation

Fixed in
Apache Syncope≥ 4.0.7

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1082639.9
Astron Agent is an agentic workflow platform for building and running AI agents. Prior…
CVE-2026-1021258.8
The sandbox that isolates document conversion on a Kiteworks appliance did not fully…
CVE-2026-956999.6
Prior to 9/18/2026, the iSteamX mobile application's AWS policy could grant…
CVE-2026-829648.8
Improper preservation of permissions in the Avast sandbox minifilter driver…
CVE-2026-622468.5
Kamaji is the Hosted Control Plane Manager for Kubernetes. Prior to 26.7.4-edge, Kamaji…
CVE-2026-630719.8
Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An…

Frequently asked

Is CVE-2026-53405 being actively exploited?

CVE-2026-53405 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.75%.

How severe is CVE-2026-53405?

CVE-2026-53405 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.75% probability of exploitation.

Which products are affected by CVE-2026-53405?

Affected products include Apache Syncope.

How do I fix CVE-2026-53405?

Upgrade affected software to a fixed version, for example Apache Syncope 4.0.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-53405 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.