CVE-2026-31234
Critical · 9.8CVSS
9.8
EPSS
1.0%
Published
May 12, 2026
CISA due date
—
The record
Horovod thru 0.28.1 contains an insecure deserialization vulnerability (CWE-502) in its KVStore HTTP server component. The KVStore server, used for distributed task coordination, lacks authentication and authorization controls, allowing any remote attacker to write arbitrary data via HTTP PUT requests. When a Horovod worker reads data from the KVStore (via HTTP GET), it deserializes the data using cloudpickle.loads() without verifying its source or integrity. An attacker can exploit this by sending a malicious pickle payload to the server before the legitimate data is written, causing the victim worker to deserialize and execute arbitrary code, leading to remote code execution.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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Related vulnerabilities
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- CVE-2026-112081 A vulnerability was determined in hankcs HanLP up to 2.1.0-beta.64. CWE-502
- CVE-2026-96745 Deserialization of untrusted data in the command monitoring support of the MongoDB PHP… CWE-502
- CVE-2026-62107 Unauthenticated PHP Object Injection in Masteriyo - LMS <= 3.4.0 versions. CWE-502
- CVE-2026-62103 Unauthenticated PHP Object Injection in Everest Forms <= 3.6.0 versions. CWE-502
- CVE-2026-62105 Unauthenticated PHP Object Injection in ThemeREX Addons < 2.45.0 versions. CWE-502
- CVE-2026-73699 FileRun before 2026.3.0 contains a PHP object injection vulnerability that allows… CWE-502
- CVE-2026-82925 The Site Reviews WordPress plugin before 8.3.0 does not prevent request data from being… CWE-502