CVE-2026-62183 Apache Syncope: User self-service privilege escalation

Critical 9.8 Published 20 Jul 2026 Updated 21 Jul 2026

Attackers can escalate privileges to administrator via self-service API if specific workflow adapters are configured without admin approval.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-62183?

CVE-2026-62183 is a critical vulnerability in Apache Syncope, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Improper Privilege Management vulnerability in Apache Syncope.

When:

* the all-Java user workflow adapter is configured, or * the Flowable user workflow adapter is configured, bearing a BPMN definition not requiring admin approval for user self registration of self update requests

the following scenario could happen. A REST API call can allow the user to grant themselves one or more of defined Roles, thus gaining their Entitlements and becoming in fact an administrator; the actual Entitlements gained depend on the Roles that are effectively defined on the specific Syncope deployment.

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.

Weakness: CWE-269

Which versions are affected by CVE-2026-62183?

It affects 1 product.

Products include Apache Syncope.

How do I fix CVE-2026-62183?

No fix has been published for CVE-2026-62183 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-62183 being exploited?

There is no known exploitation of CVE-2026-62183 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Sources

Also known as GHSA-p386-8623-243g.