{"id":"CVE-2026-5366","state":"PUBLISHED","title":"Git Argument Injection in prefecthq/prefect","description":"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.","publishedAt":"2026-06-20T16:43:37.345Z","updatedAt":"2026-06-22T17:25:02.152Z","severity":{"score":9.9,"label":"Critical","version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","source":"@huntr_ai"},"assigner":"@huntr_ai","products":["prefecthq prefecthq/prefect"],"affected":[{"vendor":"prefecthq","product":"prefecthq/prefect","versions":[{"version":"unspecified","status":"affected","lessThanOrEqual":"latest","versionType":"custom"}]}],"references":["https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/5xxx/CVE-2026-5366.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-5366","state":"PUBLISHED","datePublished":"2026-06-20T16:43:37.345Z","dateUpdated":"2026-06-22T17:25:02.152Z","assignerShortName":"@huntr_ai","assignerOrgId":"c09c270a-b464-47c1-9133-acb35b22c19a","dateReserved":"2026-04-01T18:18:27.682Z"},"containers":{"cna":{"title":"Git Argument Injection in prefecthq/prefect","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."}],"affected":[{"vendor":"prefecthq","product":"prefecthq/prefect","versions":[{"version":"unspecified","status":"affected","lessThanOrEqual":"latest","versionType":"custom"}]}],"references":[{"url":"https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a"}],"metrics":[{"cvssV3_0":{"version":"3.0","attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","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","baseScore":9.9,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","type":"CWE","lang":"en","description":"CWE-94 Improper Control of Generation of Code"}]}],"providerMetadata":{"shortName":"@huntr_ai","orgId":"c09c270a-b464-47c1-9133-acb35b22c19a","dateUpdated":"2026-06-20T16:43:37.345Z"},"source":{"advisory":"e2e88a0f-a8f6-49c9-94c5-e98dc385f07a","discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-22T17:24:58.249220Z","id":"CVE-2026-5366","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-22T17:25:02.152Z"}}]}}}