SecureBucket Parent Evidence Spoofing in Policy Validator

CVE-2026-82861 is a parent spoof bypass vulnerability in @hulumi/policies versions before 1.3.2 that allows attackers to submit falsified SecureBucket parent evidence during policy evaluation. By crafting spoofed evidence, attackers can circumvent security policy checks designed to catch unsafe bucket configurations, meaning legitimate unsafe states pass validation and reach production. This vulnerability directly impacts organizations using this library to enforce cloud storage security policies—a critical control for preventing unauthorized access, data exposure, and compliance violations. Any deployment relying on @hulumi/policies for policy enforcement is affected until patched to version 1.3.2 or later.

While CVE-2026-82861 does not map to specific MITRE ATT&CK techniques, Casky's extended reasoning capability detects the underlying attack pattern: validation bypass through evidence tampering. Practitioners using Casky would observe findings related to CWE-284 (Improper Access Control) during code and configuration analysis. The platform's 754 mapped security skills would flag suspicious patterns in policy evaluation logic—specifically, the absence of cryptographic verification or integrity checks on parent evidence inputs, and weak or missing validation of the evidence chain. Security teams would see actionable findings highlighting the gap between policy intent and enforcement reality, enabling them to identify vulnerable @hulumi/policies deployments and prioritize remediation.