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CVE-2026-10043— MosaicML Composer Deserialization of Untrusted Data Remote Code Execution Vulnerability

Quick assessment

Affected
MosaicML Composer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Databricks Mosaic Research Composer是美国Databricks Mosaic Research公司的一款机器学习训练库。 Databricks Mosaic Research Composer 0.32.1版本存在反序列化注入漏洞，该漏洞源于解析检查点时对用户提供的数据验证不足导致反序列化不可信数据，可能允许远程攻击者在当前进程环境中执行任意代码。

AI Predicted 9.1 Difficulty: Easy EPSS 0.55% · P46

Affected Version Matrix 1

VendorProduct Version RangeStatus
MosaicML Composer 0.32.1 affected
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I. Basic Information for CVE-2026-10043

Vulnerability Information
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Vulnerability Title
MosaicML Composer Deserialization of Untrusted Data Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Databricks Mosaic Research Composer 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Databricks Mosaic Research Composer是美国Databricks Mosaic Research公司的一款机器学习训练库。 Databricks Mosaic Research Composer 0.32.1版本存在反序列化注入漏洞，该漏洞源于解析检查点时对用户提供的数据验证不足导致反序列化不可信数据，可能允许远程攻击者在当前进程环境中执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MosaicML Composer 0.32.1 -

II. Public POCs for CVE-2026-10043

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-10043

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Patches & Fixes for CVE-2026-10043 (1)

Vendor Advisories for CVE-2026-10043 (1)

IV. Related Vulnerabilities

Same product: Composer
Same vendor: MosaicML
Same weakness: CWE-502