CVE-2026-48033 in hulumi
Summary
by MITRE • 07/24/2026
Hulumi is an open-source toolkit that ships secure-by-default cloud and platform infrastructure components for Pulumi. Prior to version 1.4.0, policy packs can be bypassed by a forged Pulumi-URN logical name. This issue has been patched in version 1.4.0.
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Analysis
by VulDB Data Team • 07/24/2026
The vulnerability in Hulumi toolkit represents a critical security flaw that undermines the integrity of its policy enforcement mechanisms. This issue specifically affects the software's ability to validate and enforce security policies during infrastructure deployment operations. The problem manifests when policy packs designed to prevent unauthorized or insecure configurations can be circumvented through manipulation of the Pulumi-URN logical name field. This logical name serves as a unique identifier for resources within the Pulumi deployment system, and its forgery allows malicious actors to bypass the security controls that should normally prevent certain infrastructure configurations from being deployed.
The technical exploitation of this vulnerability occurs at the policy validation layer where Hulumi relies on Pulumi-URN identifiers to track and enforce compliance policies. When an attacker crafts a forged logical name that matches the expected format but contains malicious or non-compliant values, the system fails to properly validate against its security policies. This flaw falls under the category of improper input validation and weak access control mechanisms, aligning with CWE-20 for improper input validation and CWE-285 for improper authorization. The vulnerability essentially creates a pathway where attackers can manipulate the logical name field to bypass security checks that should normally prevent deployment of resources violating organizational policies or security standards.
The operational impact of this vulnerability extends beyond simple policy bypass scenarios, potentially allowing unauthorized access to sensitive cloud infrastructure components and compromising the secure-by-default architecture that Hulumi promises. Organizations relying on Hulumi for their infrastructure-as-code deployments face significant risk as attackers could deploy resources with elevated privileges, insecure configurations, or violate compliance requirements without detection. This issue particularly affects environments where strict governance policies are enforced, as the bypass mechanism could allow malicious actors to deploy resources that would normally be rejected by security policy enforcement systems. The vulnerability undermines the fundamental trust model of the platform's security architecture and could lead to data breaches, privilege escalation, or compliance violations.
Mitigation strategies for this vulnerability require immediate patching to version 1.4.0 where the issue has been addressed through enhanced validation of Pulumi-URN identifiers and strengthened policy enforcement mechanisms. Organizations should implement comprehensive monitoring of policy violations and deployment activities to detect any potential exploitation attempts before they can cause damage. The fix likely involves implementing additional cryptographic verification steps for logical names, enhancing the integrity checks on resource identifiers, and strengthening the authorization mechanisms that validate policy compliance. Security teams should also conduct thorough audits of their infrastructure deployments to identify any previously compromised resources that may have bypassed security controls through this vulnerability. This remediation aligns with ATT&CK technique T1566 for credential harvesting and T1078 for valid accounts usage, as the bypass could enable unauthorized access to cloud resources through manipulated deployment identifiers.