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CVE-2026-109153

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

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.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mosaicml
Products
Composer
CVE-2026-10043

MosaicML Composer Deserialization of Untrusted Data Remote Code Execution Vulnerability

MosaicML Composer Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of MosaicML Composer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of checkpoints. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-27990.

CVSS 3.0 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Mosaicml
Products
Composer