CVE-2026-0302: Palo Alto Checkov RCE Vulnerability

CVE-2026-0302 Overview

CVE-2026-0302 is an operating system (OS) command injection vulnerability in Palo Alto Networks Checkov by Prisma® Cloud. The flaw enables a local authenticated user to execute arbitrary commands within the processes running Checkov. Checkov is an open-source static analysis tool used to scan infrastructure-as-code (IaC) for misconfigurations and policy violations.

The vulnerability is tracked under CWE-78: Improper Neutralization of Special Elements used in an OS Command. Exploitation requires local access, low privileges, and user interaction, which limits practical attack scenarios.

Critical Impact
A local user with low privileges can inject OS commands into Checkov processes, potentially affecting the confidentiality, integrity, and availability of downstream systems that consume Checkov scan results.

Affected Products

Palo Alto Networks Checkov by Prisma® Cloud
Infrastructure-as-code scanning workflows that invoke Checkov
CI/CD pipelines integrating Checkov policy checks

Discovery Timeline

2026-09-10 - CVE-2026-0302 published to the National Vulnerability Database (NVD)
2026-09-10 - Last updated in NVD database

Technical Details for CVE-2026-0302

Vulnerability Analysis

CVE-2026-0302 is an OS command injection issue mapped to CWE-78. Checkov, when processing attacker-influenced input, fails to neutralize special shell metacharacters before passing values to an underlying OS command interpreter. As a result, a local user can craft input that breaks out of the intended command context and executes arbitrary commands under the identity of the Checkov process.

The attack vector is local, and the attacker must already possess valid low-privilege credentials on the host. User interaction is also required, which typically means an administrator or automated pipeline must invoke Checkov against the malicious input. The scope of impact extends to subsequent systems consuming Checkov output, which is why the subsequent system confidentiality, integrity, and availability metrics are rated High.

Root Cause

The root cause is improper neutralization of special elements used in an OS command. Checkov constructs command strings that incorporate user-controlled data, such as file paths, repository names, or configuration values, without adequate escaping or use of safe process-invocation APIs. When these strings reach a shell or command runner, embedded metacharacters such as ;, &&, |, or backticks are interpreted as command separators.

Attack Vector

A local, authenticated user places crafted content in an IaC file, configuration input, or command-line argument that Checkov later evaluates. When Checkov runs, the injected sequence executes in the process context of Checkov itself. In shared build agents or CI/CD runners, this allows the attacker to influence artifacts, exfiltrate secrets accessible to the scanner, or pivot into other pipeline stages.

No public proof-of-concept exploit is currently available for CVE-2026-0302. Technical details are described in prose only; refer to the Palo Alto Networks CVE-2026-0302 advisory for vendor-provided specifics.

Detection Methods for CVE-2026-0302

Indicators of Compromise

Unexpected child processes spawned by the checkov process, such as sh, bash, cmd.exe, curl, or wget.
IaC files or repository inputs containing shell metacharacters (;, |, &&, backticks, $(...)) in fields normally holding paths or identifiers.
Outbound network connections initiated from CI/CD build agents during Checkov scan phases that do not match baseline behavior.

Detection Strategies

Monitor process ancestry on build agents and developer workstations for checkov spawning shell interpreters or network utilities.
Inspect Checkov invocation arguments and environment variables for shell metacharacters passed through repository content or pipeline parameters.
Alert on file writes to sensitive locations such as SSH key directories, CI secrets stores, or scheduled task paths during Checkov execution.

Monitoring Recommendations

Enable command-line auditing on hosts that run Checkov and forward events to a central analytics platform for correlation.
Baseline normal Checkov runtime behavior, including expected child processes and network destinations, and alert on deviations.
Track version and integrity of the deployed Checkov binary across build infrastructure to detect unauthorized modification.

How to Mitigate CVE-2026-0302

Immediate Actions Required

Upgrade Checkov to the fixed release identified in the Palo Alto Networks security advisory.
Restrict who can submit IaC content or arguments to Checkov scans, especially on shared build infrastructure.
Run Checkov under a dedicated low-privilege service account with no access to production credentials or long-lived secrets.

Patch Information

Palo Alto Networks published the advisory for CVE-2026-0302 on 2026-09-10. Consult the vendor advisory for the fixed version numbers and upgrade guidance specific to your Checkov deployment or Prisma® Cloud integration.

Workarounds

Isolate Checkov execution inside ephemeral containers or sandboxed CI runners that are discarded after each scan.
Validate and sanitize any user-controlled paths, arguments, or repository metadata before passing them to Checkov invocations.
Apply least-privilege file system and network egress controls to the account executing Checkov to limit blast radius.

bash

# Configuration example: run Checkov in an ephemeral, low-privilege container
docker run --rm \
  --user 10001:10001 \
  --read-only \
  --network none \
  -v "$(pwd)/iac:/iac:ro" \
  bridgecrew/checkov:latest \
  --directory /iac --quiet