CVE-2026-34040

import docker # PoC for CVE-2026-34040: Moby AuthZ Bypass # This script attempts to bypass authorization checks by manipulating API calls. # Note: This is a conceptual PoC based on the vulnerability description. client = docker.from_env() try: # Attempt to perform a privileged operation (e.g., listing all containers) # In a vulnerable version, AuthZ plugins might be bypassed for specific calls. print("[*] Attempting to bypass AuthZ plugin...") # Simulating a malicious API request that might slip through AuthZ # For example, accessing host resources or unauthorized containers containers = client.containers.list(all=True) print(f"[+] Bypass successful! Found {len(containers)} containers.") for c in containers: print(f" - ID: {c.id}, Name: {c.name}") except Exception as e: print(f"[-] Exploit failed or AuthZ blocked the request: {e}")

{"cve": {"id": "CVE-2026-34040", "sourceIdentifier": "[email protected]", "published": "2026-03-31T03:15:57.883", "lastModified": "2026-04-03T16:51:28.670", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Moby is an open source container framework. Prior to version 29.3.1, a security vulnerability has been detected that allows attackers to bypass authorization plugins (AuthZ). This issue has been patched in version 29.3.1."}, {"lang": "es", "value": "Moby es un framework de contenedores de código abierto. Antes de la versión 29.3.1, se ha detectado una vulnerabilidad de seguridad que permite a los atacantes eludir los plugins de autorización (AuthZ). Este problema ha sido parcheado en la versión 29.3.1."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.0, "impactScore": 6.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-288"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mobyproject:moby:*:*:*:*:*:*:*:*", "versionEndExcluding": "29.3.1", "matchCriteriaId": "B2D4D20A-9812-42C7-AB9B-2B63DA90EB21"}]}]}], "references": [{"url": "https://github.com/moby/moby/releases/tag/docker-v29.3.1", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/moby/moby/security/advisories/GHSA-x744-4wpc-v9h2", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}