CVE-2026-84173
Received Received - Intake

Authorization Bypass in Eclipse Ankaios via Wildcard Rule

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: Eclipse Foundation

Description
In Eclipse Ankaios versions v0.5.1 through v1.0.1, the agent-side Control Interface authorizer incorrectly evaluates multi-segment allow rules whose first path segment is a wildcard. An authenticated workload with access restricted by such a rule can submit a CompleteStateRequest or UpdateStateRequest with an empty field mask. The request may then be incorrectly authorized as matching the scoped rule, allowing the workload to read the complete cluster state or replace state outside its authorized subtree. This may result in unauthorized disclosure or modification of other workloads and cluster configuration. Only a rule consisting solely of * is intended to authorize an empty mask. Mitigation: Until an update containing the fix is installed, avoid multi-segment Control Interface allow-rule filter masks that begin with a wildcard, such as *.workloads.some_workload. Replace them with explicit paths such as desiredState.workloads.some_workload, where applicable. A filter mask consisting solely of * has different, intentionally unrestricted semantics and should only be used when full-state access is intended.

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2026-84173
EUVD
EUVD-2026-72323

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
eclipse ankaios From 0.5.1 (inc) to 1.0.1 (inc)
eclipse ankaios 1.0.2

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

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Executive Summary

In Eclipse Ankaios versions v0.5.1 through v1.0.1, the agent-side Control Interface authorizer incorrectly evaluates multi-segment allow rules whose first path segment is a wildcard. An authenticated workload with access restricted by such a rule can submit a CompleteStateRequest or UpdateStateRequest with an empty field mask. The request may then be incorrectly authorized as matching the scoped rule, allowing the workload to read the complete cluster state or replace state outside its authorized subtree.

Detection Guidance

This vulnerability is specific to Eclipse Ankaios configuration and requires checking for misconfigured Control Interface allow rules. Inspect Ankaios agent configuration files for rules starting with wildcards like *.workloads.some_workload. Verify if empty field masks are being used in CompleteStateRequest or UpdateStateRequest calls. Check logs for unauthorized access attempts or state modifications outside authorized scopes.

Impact Analysis

This vulnerability may result in unauthorized disclosure or modification of other workloads and cluster configuration. An attacker with access to a workload could exploit this to read sensitive data or alter system state beyond their intended permissions.

Compliance Impact

This vulnerability could lead to unauthorized disclosure or modification of workloads and cluster configuration, which may violate data protection requirements under GDPR (e.g., unauthorized access to personal data) and HIPAA (e.g., unauthorized access to protected health information). The improper authorization allows attackers to read or alter sensitive data, potentially resulting in non-compliance with these regulations.

Mitigation Strategies

Review all Control Interface allow-rule filter masks in your Ankaios configuration. Remove any multi-segment rules starting with a wildcard like *.workloads.some_workload and replace them with explicit paths such as desiredState.workloads.some_workload.

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