CVE-2026-5366

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{"affected": [{"affectedData": [{"product": "prefecthq/prefect", "vendor": "prefecthq", "versions": [{"lessThanOrEqual": "latest", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "security@huntr.dev"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:prefect:prefect:3.6.23:-:*:*:*:*:*:*", "matchCriteriaId": "8305547A-5D60-463F-8056-82B8F68F91CB", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Prefect version 3.6.23 is vulnerable to remote code execution due to improper handling of user-controlled input in the `GitRepository` storage class. The `commit_sha` parameter, which is passed to git commands, lacks validation and does not include a `--` separator to distinguish user input from git flags. This allows attackers to inject arbitrary git flags, such as `--upload-pack`, enabling execution of external programs. Additionally, the `directories` parameter can be exploited to inject git flags during sparse-checkout operations. These vulnerabilities allow any user with deployment creation permissions to execute arbitrary commands on worker machines, compromising shared work pools in multi-tenant environments."}, {"lang": "es", "value": "La versi\u00f3n 3.6.23 de Prefect es vulnerable a ejecuci\u00f3n remota de c\u00f3digo debido a un manejo inadecuado de la entrada controlada por el usuario en la clase de almacenamiento \u2019GitRepository\u2019. El par\u00e1metro \u2019commit_sha\u2019, que se pasa a los comandos de git, carece de validaci\u00f3n y no incluye un separador \u2019--\u2019 para distinguir la entrada del usuario de las banderas de git. Esto permite a los atacantes inyectar banderas de git arbitrarias, como \u2019--upload-pack\u2019, lo que permite la ejecuci\u00f3n de programas externos. Adem\u00e1s, el par\u00e1metro \u2019directories\u2019 puede ser explotado para inyectar banderas de git durante operaciones de sparse-checkout. Estas vulnerabilidades permiten a cualquier usuario con permisos de creaci\u00f3n de despliegues ejecutar comandos arbitrarios en m\u00e1quinas de trabajo, comprometiendo los pools de trabajo compartidos en entornos multi-inquilino."}], "id": "CVE-2026-5366", "lastModified": "2026-10-25T23:10:00.167", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "security@huntr.dev", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5366", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-22T17:24:58.249220Z", "version": "2.0.3"}}]}, "published": "2026-06-20T17:16:26.560", "references": [{"source": "security@huntr.dev", "tags": ["Exploit", "Third Party Advisory"], "url": "https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"], "url": "https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a"}], "sourceIdentifier": "security@huntr.dev", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security@huntr.dev", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "prefecthq/prefect", "source": "cna", "vendor": "prefecthq"}, "product": "prefecthq/prefect", "vendor": "prefecthq"}], "created": "2026-06-20T19:00:05.445273+00:00", "updated": "2026-06-20T19:30:05.851038+00:00", "vendors": ["prefecthq", "prefecthq$PRODUCT$prefecthq/prefect"]}