MosaicML Composer 0.32.1 deserialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.62-

Summaryinfo

A vulnerability described as problematic has been identified in MosaicML Composer 0.32.1. Affected by this vulnerability is an unknown functionality. The manipulation results in deserialization. This vulnerability is known as CVE-2026-10043. Attacking locally is a requirement. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in MosaicML Composer 0.32.1. It has been classified as problematic. Affected is an unknown code block. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at zerodayinitiative.com. This vulnerability is traded as CVE-2026-10043 since 05/28/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

Applying the patch 6405188805a0054b4551ec49e4919c54c971d0e8 is able to eliminate this problem. The bugfix is ready for download at github.com.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (zdi): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 6405188805a0054b4551ec49e4919c54c971d0e8

Timelineinfo

05/28/2026 CVE reserved
06/25/2026 +28 days Advisory disclosed
06/25/2026 +0 days VulDB entry created
06/25/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: ZDI-26-384
Status: Confirmed

CVE: CVE-2026-10043 (🔒)
GCVE (CVE): GCVE-0-2026-10043
GCVE (VulDB): GCVE-100-373560

Entryinfo

Created: 06/25/2026 05:48
Changes: 06/25/2026 05:48 (64)
Complete: 🔍
Cache ID: 216::103

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