CVE-2026-32737

# CVE-2026-32737 PoC - Romeo NetworkPolicy Misconfiguration # This PoC demonstrates the lateral movement vulnerability import requests import socket import sys def check_romeo_version(target_url): """Check if target is running vulnerable Romeo version""" try: response = requests.get(f"{target_url}/health", timeout=5) version = response.headers.get('X-Romeo-Version', '') if version and version < '0.2.1': print(f"[VULNERABLE] Romeo version: {version}") return True return False except: return None def test_cross_namespace_access(target_namespace, target_pod_ip): """Test if cross-namespace access is possible from hardened namespace""" # In vulnerable configuration, pods in hardened namespace can reach # pods outside the namespace (e.g., default namespace) try: # Attempt connection to target pod sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) result = sock.connect_ex((target_pod_ip, 8080)) if result == 0: print(f"[CONFIRMED] Cross-namespace access to {target_pod_ip} is possible!") return True return False except Exception as e: print(f"Connection test failed: {e}") return False def list_inter_ns_network_policies(namespace): """Check for vulnerable inter-ns NetworkPolicies""" # kubectl get networkpolicies -n <namespace> | grep inter-ns # Vulnerable policies should be prefixed with 'inter-ns-' print(f"[INFO] Checking NetworkPolicies with 'inter-ns' prefix in namespace: {namespace}") print("[ACTION] Delete any NetworkPolicy prefixed with 'inter-ns-' to mitigate") if __name__ == "__main__": print("CVE-2026-32737 PoC - Romeo NetworkPolicy Lateral Movement") print("=" * 60) print("Remediation: Upgrade Romeo to >= 0.2.1 or delete inter-ns NetworkPolicies")

{"cve": {"id": "CVE-2026-32737", "sourceIdentifier": "[email protected]", "published": "2026-03-18T23:17:30.050", "lastModified": "2026-03-25T01:09:23.533", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Romeo gives the capability to reach high code coverage of Go ≥1.20 apps by helping to measure code coverage for functional and integration tests within GitHub Actions. Prior to version 0.2.1, due to a mis-written NetworkPolicy, a malicious actor can pivot from the \"hardened\" namespace to any Pod out of it. This breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement. Removing the `inter-ns` NetworkPolicy patches the vulnerability in version 0.2.1. If updates are not possible in production environments, manually delete `inter-ns` and update as soon as possible. Given one's context, delete the failing network policy that should be prefixed by `inter-ns-` in the target namespace."}, {"lang": "es", "value": "Romeo proporciona la capacidad de alcanzar una alta cobertura de código de aplicaciones Go ?1.20 al ayudar a medir la cobertura de código para pruebas funcionales y de integración dentro de GitHub Actions. Antes de la versión 0.2.1, debido a una NetworkPolicy mal escrita, un actor malicioso puede pivotar desde el espacio de nombres 'hardened' a cualquier Pod fuera de este. Esto rompe la propiedad de seguridad por defecto esperada como parte del programa de despliegue, lo que lleva a un posible movimiento lateral. Eliminar la NetworkPolicy 'inter-ns' corrige la vulnerabilidad en la versión 0.2.1. Si las actualizaciones no son posibles en entornos de producción, elimine manualmente 'inter-ns' y actualice lo antes posible. Dado el contexto de cada uno, elimine la política de red fallida que debería tener el prefijo 'inter-ns-' en el espacio de nombres de destino."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.9, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 10.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-284"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ctfer-io:romeo:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.2.1", "matchCriteriaId": "F0F3969C-FB2C-4213-B227-E8C8F14CDA8F"}]}]}], "references": [{"url": "https://github.com/ctfer-io/romeo/commit/3bb5e9d9ce1199dfbb90fef8ad79ebdeb0bc5e78", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/ctfer-io/romeo/security/advisories/GHSA-fgm3-q9r5-43v9", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}