CVE-2026-10043

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector : AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/mosaicml/composer/commit/6405188805a0054b4551ec49e4919c54c971d0e8
https://www.zerodayinitiative.com/advisories/ZDI-26-384/

Configurations

No configuration.

History

24 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-24 22:16

Updated : 2026-06-25 19:10

NVD link : CVE-2026-10043

Mitre link : CVE-2026-10043

CVE.ORG link : CVE-2026-10043

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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