CVE-2026-82863 in hulumi
Summary
by MITRE • 08/31/2026
@hulumi/baseline versions before 1.3.2 fail to fully detect CloudTrail selector tampering events, reducing audit logging configuration change coverage. Attackers can modify CloudTrail event selectors without complete detection, potentially evading audit trail monitoring.
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Analysis
by VulDB Data Team • 08/31/2026
The vulnerability in @hulumi/baseline prior to version 1.3.2 represents a critical gap in cloud security posture management by failing to adequately detect tampering with Amazon CloudTrail selector configurations. This flaw specifically impacts the integrity of audit logging mechanisms, which are fundamental for maintaining visibility into user and resource activity within an AWS environment. When organizations rely on this tooling baseline to enforce compliance and monitor for malicious behavior, the inability to fully identify changes or manipulations to event selectors creates a significant blind spot in their security operations center capabilities.
From a technical perspective, CloudTrail event selectors define which management events or data events are logged by the service. Attackers with sufficient permissions can modify these selectors to exclude specific high-value activities from being recorded. By altering the configuration of an event selector, an adversary can effectively hide their lateral movement, privilege escalation attempts, or exfiltration efforts from standard logging pipelines. The identified vulnerability indicates that the baseline logic did not sufficiently validate or alert on all permutations of such modifications, allowing these stealthy adjustments to persist without triggering appropriate security alerts or compliance violations.
The operational impact of this deficiency is severe, as it directly undermines the principle of least privilege and non-repudiation in cloud environments. If audit trails are incomplete due to undetected selector tampering, incident response teams lose critical forensic data needed to understand the scope of a breach. This lack of visibility can lead to delayed detection times, extended dwell periods for attackers, and potential failure to meet regulatory requirements such as PCI DSS or HIPAA, which mandate comprehensive logging and monitoring of access controls. The reduction in audit logging configuration coverage means that security teams may operate under a false sense of security while an attacker operates undetected within the infrastructure.
To mitigate this risk, organizations must immediately upgrade @hulumi/baseline to version 1.3.2 or later, where the detection logic for CloudTrail selector tampering has been corrected and expanded. In addition to updating the tooling, it is advisable to implement supplementary guardrails using AWS Config rules that specifically monitor for changes in trail configurations and event selectors. Enabling CloudTrail log file validation ensures data integrity, while integrating these logs into a centralized SIEM with strict alerting on configuration change events can provide an additional layer of defense against such evasion techniques.
This vulnerability aligns with CWE-798 Use of Hard-coded Credentials if the baseline relied on static configurations that did not adapt to dynamic cloud states, but more accurately maps to CWE-1063 Development Environment Configuration Error where security controls were insufficiently implemented in the tooling logic. In terms of offensive tactics, this relates directly to ATT&CK technique T1562 Impair Defenses, specifically sub-technique T1562.004 Disable or Modify Tools, as attackers modify logging mechanisms to evade detection. Addressing this issue is essential for restoring the integrity of cloud audit trails and ensuring that security monitoring remains effective against sophisticated adversaries seeking to conceal their presence.