CVE-2026-75030 Overview
CVE-2026-75030 is a Missing Authorization vulnerability [CWE-862] in Apache Syncope, an open source identity management system. An administrator holding task execution entitlements can mass (de)provision group members regardless of their group-related administration capabilities. The flaw bypasses group-scoped authorization checks that normally restrict which administrators can manage specific group memberships.
The issue affects Apache Syncope from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.7, and from 4.1.0-M0 through 4.1.2. Apache published fixes in versions 4.0.8 and 4.1.3.
Critical Impact
An authenticated administrator with task execution rights can provision or deprovision members across arbitrary groups, undermining tenant isolation and delegated administration boundaries.
Affected Products
- Apache Syncope 3.0.0-M0 through 3.0.16
- Apache Syncope 4.0.0-M0 through 4.0.7
- Apache Syncope 4.1.0-M0 through 4.1.2
Discovery Timeline
- 2026-09-14 - CVE-2026-75030 published to NVD
- 2026-09-14 - Last updated in NVD database
Technical Details for CVE-2026-75030
Vulnerability Analysis
Apache Syncope enforces a delegated administration model where administrators receive entitlements that scope their authority to specific realms and groups. Task execution is a separate entitlement that permits an administrator to run scheduled or on-demand provisioning tasks against connected identity stores.
The vulnerability arises because the mass (de)provisioning task path does not re-validate the caller's group-level administration capabilities before acting on group memberships. An administrator granted only task execution rights can therefore trigger provisioning workflows that add or remove users from groups they do not otherwise administer. The result is an authorization bypass that collapses the boundary between task execution and group administration.
Successful exploitation can propagate unauthorized membership changes to downstream systems connected through Syncope connectors, including directory services and application accounts.
Root Cause
The root cause is a missing authorization check on the task execution code path that handles group (de)provisioning. Syncope evaluates task entitlements without additionally verifying that the executing administrator holds the group-scoped administrative capabilities required for the affected memberships.
Attack Vector
Exploitation requires an authenticated Syncope administrator with task execution entitlements. The attacker invokes a mass provisioning or deprovisioning task through the Syncope REST API or admin console. Because the authorization gate does not enforce group-level scope, the task proceeds against any group members targeted by the task definition.
Refer to the Apache Mailing List Discussion and the OpenWall OSS Security Update for the vendor's technical description.
Detect Identity Attacks the Moment Authentication Fails
Singularity™ Identity surfaces credential misuse, lateral movement, and privilege escalation in real time, so you can contain the breach before it spreads.
Stop Identity AttacksDetection Methods for CVE-2026-75030
Indicators of Compromise
- Unexpected PROVISION or DEPROVISION task executions in Syncope audit logs initiated by administrators without group administration entitlements.
- Bulk membership changes across groups within a short window originating from a single administrator identity.
- Downstream connector activity, such as LDAP modify operations or application account removals, correlated with Syncope task runs.
Detection Strategies
- Review Syncope audit logs for TaskLogic and PropagationTask events and cross-reference the caller's granted entitlements against the affected groups.
- Alert on administrators executing mass provisioning tasks targeting groups outside their assigned realm or group scope.
- Baseline normal provisioning task volume per administrator and flag statistically significant deviations.
Monitoring Recommendations
- Forward Syncope application and audit logs to a centralized analytics platform for correlation with identity provider telemetry.
- Monitor connector target systems, including Active Directory and application databases, for unexplained group membership modifications.
- Track creation of new task definitions and changes to existing task filters that broaden their scope.
How to Mitigate CVE-2026-75030
Immediate Actions Required
- Upgrade Apache Syncope to version 4.0.8 or 4.1.3 immediately. Users on the 3.0.x branch should plan a supported upgrade path since fixed 3.0.x builds are not listed in the advisory.
- Audit all accounts holding task execution entitlements and remove the entitlement from administrators who do not require it.
- Review recent provisioning and deprovisioning task history for unauthorized group membership changes.
Patch Information
Apache Syncope versions 4.0.8 and 4.1.3 remediate CVE-2026-75030 by adding the missing group-scope authorization check to the task execution path. Vendor guidance is documented in the Apache Mailing List Discussion.
Workarounds
- Restrict the task execution entitlement to a minimal set of trusted platform administrators until patching completes.
- Disable or remove mass provisioning task definitions that operate across groups spanning multiple administrative scopes.
- Enforce change control on task definitions so that new or modified provisioning tasks require secondary approval.
# Configuration example - identify administrators with task execution rights
# Query via Syncope REST API (requires admin credentials)
curl -u <admin>:<password> \
-H "Accept: application/json" \
https://syncope.example.com/syncope/rest/roles \
| jq '.[] | select(.entitlements[] | contains("TASK_EXECUTE"))'
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
