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Vulnerability record · CVE-2026-31238 · published 12 May 2026

CVE-2026-31238: Deserialization of untrusted data vulnerability

The Ludwig framework thru 0.10.4 is vulnerable to insecure deserialization (CWE-502) in its model serving component. When starting a model server with the ludwig serve command, the framework loads model weight files using torch.load() without enabling the security-restrictive weights_only=True parameter. This default behavior allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing a maliciously crafted PyTorch model file, leading to arbitrary code execution on the system hosting the Ludwig model server.

9.8 CVSS 3.1 Critical EPSS 0.73% · top 47.8% CWE-502 · Deserialization of untrusted data Deferred
9.8CVSS 3.1 base score
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

The Ludwig framework thru 0.10.4 is vulnerable to insecure deserialization (CWE-502) in its model serving component. When starting a model server with the ludwig serve command, the framework loads model weight files using torch.load() without enabling the security-restrictive weights_only=True parameter. This default behavior allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing a maliciously crafted PyTorch model file, leading to arbitrary code execution on the system hosting the Ludwig model server.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/ludwig-ai/ludwig
https://www.notion.so/CVE-2026-31238-35d1e1393188819ea77ee98ca85a2878

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Source: NIST National Vulnerability Database (record CVE-2026-31238), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.