IAM Policy Bypass in @hulumi/policies Administrator Guardrail

@hulumi/policies versions before 1.3.2 fail to fully inspect inline and attached IAM policy evidence for the administrator-policy guardrail. Attackers can craft admin-equivalent policy paths that bypass policy evaluation controls.

Casky was already ahead

This CVE exploits attack patterns that Casky's 224matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-82860 represents a critical flaw in the @hulumi/policies library where versions before 1.3.2 fail to properly validate inline and attached IAM policy evidence for administrator-level policy guardrails. This vulnerability allows attackers to craft specially designed policy paths that circumvent policy evaluation controls, effectively granting administrator-equivalent permissions without proper authorization checks. Organizations using affected versions face significant risk of privilege escalation and unauthorized access to sensitive cloud resources, particularly those relying on this library for identity and access management enforcement across multi-tenant or complex permission hierarchies.

Casky's 224 mapped skills leverage Claude's extended reasoning capabilities to detect the privilege escalation patterns underlying TA0004 (Privilege Escalation) techniques. Practitioners using Casky would identify this vulnerability through analysis of IAM policy structure anomalies—specifically, detection of policy evaluation bypasses and insufficient policy inspection patterns that precede privilege escalation attacks. The platform's skills would flag suspicious inline policy constructions and attached policy evidence that don't undergo complete validation chains, surfacing findings that show how attackers craft admin-equivalent permission paths. By correlating policy inspection gaps with MITRE ATT&CK TA0004 techniques, security teams gain visibility into the exact control weaknesses that enable this CVE, enabling them to prioritize patching to version 1.3.2 and audit existing policies for potentially malicious constructions already in place.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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224 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-82860.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004

Investigate the attack patterns behind CVE-2026-82860

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