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The vulnerability in `@hulumi/policies` versions prior to 1.3.2 stems from an improper validation of “parent evidence” for the `SecureBucket` resource in the HULUMI-H1 policy engine. The `SecureBucket` component, which enforces security boundaries for cloud storage, relies on a chain of evidence to verify its parent resource. The vulnerable versions of the policy evaluator did not correlate the supplied evidence with the expected relationship between components. An attacker could craft a spoofed parent evidence payload that does not originate from the actual parent but is still accepted by the validator. During policy evaluation, this missing correlation caused the engine to treat an unsafe bucket shape as compliant because the secure parent relationship appeared to be present, even though it was forged. The flaw effectively bypassed the guardrail intended to prevent misconfigured bucket attachments. The fix, implemented in version 1.3.2, modifies the validator to enforce a strict correlation between evidence and the expected component/resource relationship, ensuring that only legitimate parent evidence passes the check. Regression coverage was also added to prevent similar bypasses in the future.
dailycve form:
Platform: npm package
Version: <1.3.2
Vulnerability: Parent spoof
Severity: High
date: 2026-05-15
Prediction: 2026-05-15 (patched)
Analytics under heading What Undercode Say:
Check installed version of @hulumi/policies npm list @hulumi/policies Update to patched version 1.3.2 or later npm install @hulumi/[email protected] Verify the update npm list @hulumi/policies Simulate the vulnerable condition (for testing only) cat <<EOF > test-spoof.js const { validateSecureBucket } = require('@hulumi/policies'); const spoofedEvidence = { parent: 'spoofed-bucket', type: 'SecureBucket' }; validateSecureBucket(spoofedEvidence); // Before patch: returns true EOF Run a policy validation test (requires HULUMI-H1 setup) node test-spoof.js
Exploit:
An attacker with the ability to submit a policy evaluation request for a `SecureBucket` could supply falsified parent evidence. For example, by manipulating the evidence chain to reference an approved parent bucket that is not the actual parent, the vulnerable policy engine would incorrectly validate the bucket as safe. This could allow the creation of an unsafe bucket shape (e.g., a bucket with overly permissive access or misconfigured encryption) while bypassing the security guardrail that would normally block it.
Protection from this CVE:
- Upgrade: Immediately update `@hulumi/policies` to version 1.3.2 or later.
- Post-upgrade validation: Run regression tests to ensure policy evaluations correctly reject spoofed parent evidence.
- Audit: Review any existing `SecureBucket` configurations created before the upgrade for potential misconfigurations that may have been accepted due to this bypass.
- Monitor: Enable logging for policy evaluation rejections to detect any exploitation attempts.
Impact:
High. Successful exploitation allows an attacker to cause the policy engine to miss an unsafe bucket shape, potentially leading to deployment of misconfigured cloud storage resources that could expose data or violate compliance requirements. The attack vector is remote and requires no authentication, making it easily exploitable if the vulnerable package is in use.
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Sources:
Reported By: github.com
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