koxudaxi datamodel-code-generator up to 0.69.x customBasePath code injection

Summaryinfo

A vulnerability has been found in koxudaxi datamodel-code-generator up to 0.69.x and classified as critical. The affected element is an unknown function. This manipulation of the argument customBasePath causes code injection. This vulnerability appears as CVE-2026-63720. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in koxudaxi datamodel-code-generator up to 0.69.x and classified as critical. Affected by this vulnerability is an unknown part. The manipulation of the argument customBasePath with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

datamodel-code-generator prior to version 0.70.0 contains a code injection vulnerability that allows attackers who control input schemas to achieve remote code execution by supplying a malicious customBasePath value containing embedded newlines and a dot-free Python expression. The crafted value is emitted verbatim into a generated 'from ... import ...' statement without identifier validation, causing arbitrary Python code to execute when the generated module is imported.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-63720 since 07/17/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 0.70.0 eliminates this vulnerability. Applying the patch 545a96c5 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-49050). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• koxudaxi

Name

• datamodel-code-generator

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.54
• 0.55
• 0.56
• 0.57
• 0.58
• 0.59
• 0.60
• 0.61
• 0.62
• 0.63
• 0.64
• 0.65
• 0.66
• 0.67
• 0.68
• 0.69

Website

• Product: https://github.com/koxudaxi/datamodel-code-generator/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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