{"id":"CVE-2026-109153","summary":"MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal","details":"A vulnerability was detected in MosaicML Composer up to 0.32.1. This affects the function tarball.extractall of the file composer/utils/checkpoint.py of the component Checkpoint Extraction. The manipulation results in path traversal. The attack can be executed remotely. The vendor was contacted early about this disclosure.","modified":"2026-10-15T02:47:21.348349929Z","published":"2026-10-13T10:00:20.259Z","database_specific":{"cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109153.json","cna_assigner":"VulDB"},"references":[{"type":"WEB","url":"https://github.com/mosaicml/composer/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109153.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109153"},{"type":"ADVISORY","url":"https://vuldb.com/cve/CVE-2026-109153"},{"type":"ADVISORY","url":"https://vuldb.com/submit/978647"},{"type":"ADVISORY","url":"https://vuldb.com/vuln/416887"},{"type":"REPORT","url":"https://github.com/mosaicml/composer/issues/3942"},{"type":"REPORT","url":"https://vuldb.com/vuln/416887/cti"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mosaicml/composer","events":[{"introduced":"beed9b19983e170aa53cda02136ba1eb1513eede"},{"last_affected":"4bfb5fc44b8bbde26b035a43b9311003013a4252"}],"database_specific":{"extracted_events":[{"introduced":"0.32.0"},{"last_affected":"0.32.0"},{"introduced":"0.32.1"},{"last_affected":"0.32.1"}],"source":"AFFECTED_FIELD"}}],"versions":["0.32.0","0.32.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109153.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X"}]}