{"cve":"CVE-2026-100844","nvd":{"published":"2026-09-27T02:17:22.993","modified":"2026-09-30T15:33:29.100","status":"Analyzed","description":"MONAI before 1.6.0 is vulnerable to OS command injection in the nnUNetV2Runner component (monai.apps.nnunet.nnunetv2_runner). User-controlled values taken from the YAML configuration file (notably dataset_name_or_id) and from CLI/kwargs arguments are concatenated into a command string without quoting or validation and then passed to subprocess with shell=True, so shell metacharacters (e.g., ';' on Linux, '&' on Windows) are interpreted. If a victim loads and processes a crafted configuration file — for example by instantiating nnUNetV2Runner with the malicious YAML and invoking a training/validation job such as train_single_model() — arbitrary commands are executed with the privileges of the user running the job.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.6},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-78"],"references":["https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-rghg-q7wp-9767","https://www.vulncheck.com/advisories/monai-before-1.6.0-os-command-injection-via-dataset-name-or-id","https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-rghg-q7wp-9767"],"products":["project-monai:monai"],"source":"nvd","synced_at":"2026-10-19T22:56:48.555445741+00:00"},"epss":{"cve":"CVE-2026-100844","score":0.00922,"percentile":0.60077,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-rghg-q7wp-9767","url":"https://osv.dev/vulnerability/GHSA-rghg-q7wp-9767","summary":"MONAI vulnerable to OS command injection","modified":"2026-10-01T09:26:04.128653482Z","packages":[{"ecosystem":"PyPI","name":"monai","purl":"pkg:pypi/monai","ranges":["<1.6.0"],"fixed":["1.6.0"]}]},{"id":"PYSEC-2026-4019","url":"https://osv.dev/vulnerability/PYSEC-2026-4019","summary":"","modified":"2026-10-01T09:15:05.310406723Z","packages":[{"ecosystem":"PyPI","name":"monai","purl":"pkg:pypi/monai","ranges":["<1.6.0"],"fixed":["1.6.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}