CVE-2026-92611 in Ankaios
Summary
by MITRE • 09/17/2026
In Eclipse Ankaios versions 0.6.0 to before 1.0.4, `LogRule::matches` in the agent control-interface authorizer stops at the first wildcard pattern in a single rule instead of evaluating later entries, which can cause deny `LogRule` entries to be skipped and allow unauthorized access to another workload's logs.
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Analysis
by VulDB Data Team • 09/17/2026
The vulnerability identified in Eclipse Ankaios versions ranging from 0.6.0 up to but not including version 1.0.4 represents a critical flaw within the agent control-interface authorizer logic, specifically residing in the LogRule::matches function. This component is responsible for determining whether an agent has permission to access specific log data based on defined rules. The core technical defect lies in how wildcard patterns are processed during rule evaluation. When a single rule contains multiple entries or conditions involving wildcards, the implementation prematurely terminates its matching process upon encountering the first wildcard pattern. Instead of continuing to evaluate subsequent entries within that same rule to ensure comprehensive compliance with all specified constraints, the function returns immediately based on the initial match. This behavior fundamentally breaks the intended logical conjunction of rules where deny policies should take precedence or be fully validated against all relevant criteria before access is granted or denied.
From a security architecture perspective, this flaw leads directly to an authorization bypass scenario. In typical role-based access control systems, deny rules are designed to explicitly block specific actions regardless of other permissive settings. However, due to the premature termination caused by the wildcard handling error, deny LogRule entries can be inadvertently skipped if they appear after a wildcard entry within the same rule structure. Consequently, an attacker or malicious actor who has been granted limited access might exploit this logic gap to escalate privileges beyond their intended scope. Specifically, this allows unauthorized entities to read logs belonging to other workloads that should have been strictly isolated from them. The failure to properly evaluate deny conditions means that security boundaries enforced by these rules are effectively nullified for any rule set containing mixed wildcard and specific deny patterns.
The operational impact of this vulnerability is significant in multi-tenant or microservices environments where log isolation is critical for both security auditing and privacy compliance. Unauthorized access to another workload's logs can lead to the exposure of sensitive internal application states, configuration details, error messages that reveal system architecture, or potentially credentials embedded within log outputs. This constitutes a severe breach of confidentiality and violates the principle of least privilege. Attackers could use this information for further reconnaissance, identifying vulnerabilities in other parts of the infrastructure, or conducting social engineering attacks based on exposed operational data. In regulated industries, such unauthorized access may also result in non-compliance with standards like GDPR, HIPAA, or PCI-DSS which mandate strict controls over sensitive data access and logging practices.
This vulnerability aligns closely with CWE-284 Improper Access Control, as the system fails to restrict resources from authorized actors appropriately due to a logic error in permission evaluation. It also maps to MITRE ATT&CK technique T1078 Valid Accounts if an attacker uses legitimate but misconfigured credentials, or more specifically relates to privilege escalation through authorization bypass mechanisms often categorized under lateral movement techniques where access to one system component is leveraged to compromise others. The root cause can be traced back to CWE-693 Protection Mechanism Failure, as the internal logic of the protection mechanism does not function correctly when processing complex rule sets involving wildcards.
To mitigate this vulnerability, organizations running Eclipse Ankaios must upgrade immediately to version 1.0.4 or later where the LogRule::matches function has been corrected to evaluate all entries within a rule rather than stopping at the first wildcard. Until an upgrade is feasible, administrators should review their log access rules and avoid combining wildcard patterns with deny statements in the same rule definition. Instead, separate specific deny rules from permissive ones to ensure that denial logic is not bypassed by premature matching termination. Additionally, implementing strict logging monitoring for unauthorized access attempts can help detect exploitation of this flaw while patching efforts are underway. Regular audits of authorization policies and adherence to defense-in-depth principles will further reduce the risk associated with such configuration-dependent vulnerabilities.