What is CVE-2026-10043?

CVE-2026-10043 is a high-severity vulnerability in Mosaicml Composer, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2026-06-24.

How severe is CVE-2026-10043?

High severity. CVSS v3 base score is 7.8 out of 10.

Deserialization in Mosaicml Composer

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 e…

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Mosaicml Composer — versions 0.32.1

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

zdi-disclosures@trendmicro.com (x_research-advisory)
zdi-disclosures@trendmicro.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-10043?: CVE-2026-10043 is a high-severity vulnerability in Mosaicml Composer, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2026-06-24.
How severe is CVE-2026-10043?: High severity. CVSS v3 base score is 7.8 out of 10.