CVE-2026-109153

MEDIUM 6.3

MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	mosaicml
Product	composer
Published	Oct 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

MosaicML / Composer

0.32.0 0.32.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/416887 vuldb.com: https://vuldb.com/vuln/416887/cti vuldb.com: https://vuldb.com/cve/CVE-2026-109153 vuldb.com: https://vuldb.com/submit/978647 github.com: https://github.com/mosaicml/composer/issues/3942 github.com: https://github.com/mosaicml/composer/

Credits

🔍 Mohammedix88 (VulDB User) VulDB CNA Team