{"id":"CVE-2026-109153","revision":null,"records":[{"revision":"ca182654307d41dd98ef497823a7cbf2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109153","aliases":[],"title":"MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal","description":"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.","state":0,"publishedAt":"2026-10-13T10:00:20.259+00:00","modifiedAt":"2026-10-16T17:17:33.32+00:00","affected":[{"ecosystem":"Vendor product","name":"Composer","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"MosaicML\",\n                    \"product\": \"Composer\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.32.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0.32.1\",\n                            \"status\": \"affected\"\n                        }\n                    ],\n                    \"cpes\": [\n                        \"cpe:2.3:a:mosaicml:composer:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"modules\": [\n                        \"Checkpoint Extraction\"\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:C","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:C","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 2.0","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:ND/RC:C","score":7.5,"severity":null}],"references":["https://vuldb.com/vuln/416887","https://vuldb.com/vuln/416887/cti","https://vuldb.com/cve/CVE-2026-109153","https://vuldb.com/submit/978647","https://github.com/mosaicml/composer/issues/3942","https://github.com/mosaicml/composer/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109153","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109153","identifiers":["CVE-2026-109153"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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