{"schema":"threatline.record/2","record":{"id":"CVE-2026-109153","aliases":[],"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.","categories":["Unclassified"],"product":"Composer","vendor":"MosaicML","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109153","source_modified_at":"2026-10-16T17:17:33.320Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Composer","vendor":"MosaicML","versions":[{"version":"0.32.0","status":"affected"},{"version":"0.32.1","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00493,"percentile":0.41429,"score_date":"2026-10-23"},"published_at":"2026-10-13T10:00:20.259Z","modified_at":"2026-10-16T17:17:33.320Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109153","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-16T17:17:33.320Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109153","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://vuldb.com/vuln/416887","tags":["vdb-entry","technical-description"]},{"source":"CVE List","url":"https://vuldb.com/vuln/416887/cti","tags":["signature","permissions-required"]},{"source":"CVE List","url":"https://vuldb.com/cve/CVE-2026-109153","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://vuldb.com/submit/978647","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://github.com/mosaicml/composer/issues/3942","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/mosaicml/composer/","tags":["product"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-16T16:46:46.784553Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-16T17:17:33.320Z","content_hash":"3678dda036691dac194aad13657d3916f9067dbe46eee3697f874a5bf326d16e"}}