CVE-2026-0312: Path Traversal in Checkov by Prisma Cloud Enables Arbitrary File Write on Scanning Hosts

Executive Summary

CVE-2026-0312 is a path traversal weakness in Palo Alto Networks Checkov by Prisma Cloud that allows a local user to write files to arbitrary locations on the filesystem of the host running the scan. The physical criticality is indirect but real: Checkov is an infrastructure-as-code scanner, and in OT programs it frequently runs on engineering workstations and build servers that touch pipeline, substation, and plant automation configuration repositories.

Technical Exposure Breakdown

The vulnerable component is the Checkov scanning engine itself, specifically the file handling logic that processes the artifacts it is asked to analyze. Path traversal in a static analysis tool is a known failure class: the tool ingests attacker-influenced input, resolves a path derived from that input, and writes output or extracted content without correctly constraining the destination to an expected directory. When directory traversal sequences are not stripped or canonicalized, the write can land outside the intended workspace.

The attack vector is local. The actor does not need authentication to Checkov itself, but they need the ability to supply the content that Checkov scans, or influence the scan target. In practice that means a crafted repository, a poisoned Terraform or Kubernetes manifest, a malicious archive, or any IaC artifact that Checkov will parse during a pipeline run. Because the write is to an arbitrary location, the practical impact depends on what account the scanner runs as. A scanner running as a privileged service account on a build agent is the worst case. It can overwrite configuration, drop files into startup or cron paths, or plant content that later executes.

We do not have a CVSS score, affected version list, or patch status in the grounding data, so we are not asserting any. What we are asserting is the exposure model: arbitrary file write from parsed input is a reliable primitive for persistence and lateral movement when the host sits in a sensitive trust zone.

OT Impact and Compliance Risk

IaC scanning tools do not run inside the process network, but they run next to the people and systems that author what ends up there. Engineering workstations and CI/CD runners that validate automation configuration are increasingly part of the OT change path. A compromise of that host corrupts the integrity of what gets pushed to PLCs, RTUs, HMIs, and historian infrastructure downstream.

This maps directly to IEC 62443 requirements for the security development lifecycle and for the integrity of engineering tooling and system components. Under NERC CIP, build and engineering systems that store or generate BES Cyber System Information or that feed configuration to BES Cyber Systems fall under CIP-004, CIP-007, and CIP-010 change management expectations. For pipeline operators under TSA SD-02C, the segmentation and access control requirements assume the IT-to-OT boundary is trustworthy, and an arbitrary write primitive on a boundary-adjacent host undermines that assumption. Water utilities under AWIA 2018 risk assessments should treat scanning infrastructure as part of the attack surface, not as a benign QA appliance.

Do not attempt to validate exposure with active scanning against production OT components. Active probing of industrial endpoints can hang or brick controllers. This vulnerability lives on the IT side of the build pipeline, and that is where validation belongs.

Compensating Controls

Run Checkov under a dedicated low-privilege account with no write access outside a tightly scoped temporary workspace. Enforce that constraint with filesystem permissions and, where available, mandatory access control profiles, so an arbitrary write resolves to a directory the process cannot escape.

Isolate scanning in ephemeral, disposable containers or runners that are destroyed after each job. This bounds the blast radius of any write that lands outside the workspace and removes the persistence value of a successful traversal.

Treat scanned repositories as untrusted input. Do not run scans of externally sourced or attacker-influenceable artifacts on hosts that also hold OT configuration or credentials.

For virtual patching, instrument the build host with filesystem integrity monitoring on paths outside the designated workspace and alert on any write by the scanner process to startup, service, or configuration directories. A Suricata rule concept here is limited because the primitive is local file write rather than network-borne, so endpoint-side detection using file access auditing is the stronger control. Validate and apply the vendor fix once version and patch details are published.

BreachSpider Intel

BreachSpider tracks CVE-2026-0312 and related build-pipeline exposure across OT-adjacent tooling, and monitoring is available through Intel by BreachSpider.