Deserialization of Untrusted Data in Composer - CVE-2026-10043
Published: June 26, 2026
Vulnerability identifier: #VU135579
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-10043
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Databricks Mosaic Research
Affected software:
Composer
Composer
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data within the parsing of checkpoints. A remote attacker can trick a victim to visit a malicious page or open a malicious file and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2026-10043
Install updates from vendor's website.