CVE-2026-33414

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Las versiones 4.8.0 a la 5.8.1 contienen una vulnerabilidad de inyecci\u00f3n de comandos en el backend de m\u00e1quina HyperV en pkg/machine/hyperv/stubber.go, donde la ruta de la imagen de la VM se inserta en una cadena de PowerShell entre comillas dobles sin sanitizaci\u00f3n, permitiendo la inyecci\u00f3n de subexpresiones $(). Debido a que PowerShell eval\u00faa subexpresiones dentro de cadenas entre comillas dobles antes de ejecutar el comando externo, un atacante que puede controlar la ruta de la imagen de la VM a trav\u00e9s de un nombre de m\u00e1quina o directorio de imagen manipulado puede ejecutar comandos arbitrarios de PowerShell con los privilegios del proceso de Podman. En instalaciones t\u00edpicas de Windows, esto significa ejecuci\u00f3n de c\u00f3digo a nivel de SYSTEM, y solo Windows se ve afectado ya que el c\u00f3digo es exclusivo del backend de HyperV. Este problema ha sido parcheado en la versi\u00f3n 5.8.2."}], "id": "CVE-2026-33414", "lastModified": "2026-07-24T23:10:00.563", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.1, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 4.0, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "UNREPORTED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33414", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-16T13:57:01.669490Z", "version": "2.0.3"}}]}, "published": "2026-04-14T23:16:27.987", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/containers/podman/commit/571c842bd357ee626019ea97d030fb772fc654ed"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/containers/podman/security/advisories/GHSA-hc8w-h2mf-hp59"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:8211"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-33414"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458522"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33414.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-94"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.8.0,5.8.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "podman", "vendor": "containers"}], "analysis": {"en": {"generated_at": "2026-04-16T09:12:21.210639+00:00", "value": {"mitigation_remediation": ["Upgrade Podman to version 5.8.2 or later to remove the injection flaw.", "Configure Podman to run with the least privileges required; on Windows avoid running it under an elevated or Administrator account if possible.", "Restrict write access to the directories where machine names and image paths are stored, and validate or sanitize any user\u2011supplied values before creating machines."], "summary": {"action": "Patch Now", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected product is Podman, the container management tool provided by the containers:podman project. Versions 4.8.0 through 5.8.1 are vulnerable; all other releases are unaffected. The issue is exclusive to the HyperV backend and therefore only affects Windows installations. The vulnerability has been fixed in Podman 5.8.2.", "description_and_impact": "The vulnerability is a command injection flaw present in the HyperV machine backend of Podman. In versions 4.8.0 through 5.8.1, the VM image path is concatenated directly into a double-quoted PowerShell command without sanitization. An attacker who can influence the VM image path\u2014for example by providing a specially crafted machine name or specifying an image directory\u2014can inject a $() subexpression. PowerShell evaluates that subexpression before executing the outer command, which allows arbitrary PowerShell code to run with the same privileges as the Podman process. On Windows this means potential SYSTEM-level execution.", "risk_and_exploitability": "The CVSS score of 4 indicates a low severity, yet the ability to execute code at the Podman process level turns this into a remote code execution risk. An EPSS score of <1% (approximately 0.00028) shows a low but non\u2011zero likelihood of exploitation. The vulnerability has not been listed in CISA's KEV catalog. Attackers need to control the VM image path, which can be done if they can supply a machine name or image directory during machine creation, typically via local or remote access to the Podman service. Because the flaw uses PowerShell injection, the attack vector is Windows\u2011only, and the impact is equivalent to running arbitrary commands with SYSTEM privileges if Podman is elevated."}}}}, "created": "2026-04-15T14:31:57.022153+00:00", "updated": "2026-04-16T09:15:30.991095+00:00", "vendors": ["containers", "containers$PRODUCT$podman"]}