MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal
Published Oct 13, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- VDB-416887 | MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal ↗
- VDB-416887 | CTI Indicators (IOB, IOC, TTP, IOA) ↗
- CVE-2026-109153 | CVE Analysis and Report ↗
- Submit #978647 | mosaicml composer 0.32.1 Path Traversal ↗
- Source repository ↗
- Source repository ↗
Record history
Published Oct 13, 2026 · Last refreshed Nov 3, 2026