{"id":"CVE-2026-5366","summary":"Git Argument Injection in prefecthq/prefect","details":"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.","modified":"2026-07-08T08:07:26.109434892Z","published":"2026-06-20T16:43:37.345Z","database_specific":{"cna_assigner":"@huntr_ai","cwe_ids":["CWE-94"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5366.json"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/e2e88a0f-a8f6-49c9-94c5-e98dc385f07a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5366.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5366"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/prefecthq/prefect","events":[{"introduced":"db5763e0905ba1547e4c4d1105d5ba9ea46993d6"},{"last_affected":"db5763e0905ba1547e4c4d1105d5ba9ea46993d6"}],"database_specific":{"cpe":"cpe:2.3:a:prefect:prefect:3.6.23:-:*:*:*:*:*:*","source":"CPE_STRING","extracted_events":[{"introduced":"3.6.23-NA"},{"last_affected":"3.6.23-NA"}]}}],"versions":["3.6.23-NA","3.6.23"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5366.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}