CVE-2026-54656Public exploit

Code execution via unescaped validator decorator arguments

Published Jul 28, 2026 · Updated Jul 28, 2026

Code injection in datamodel-code-generator 0.52.1 through 0.60.1 allows attackers to execute Python code via crafted validator data. The _process_validators method inserts unescaped field names and modes from --extra-template-data into generated @field_validator calls, so a quote can terminate the intended string and add a Python expression. Execution occurs only when Pydantic v2 output is generated from attacker-influenced extra template data and the resulting module is imported, granting code execution in the developer or CI process.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in datamodel-code-generator 0.52.1 through 0.60.1 allows attackers to execute Python code via crafted validator data. The _process_validators method inserts unescaped field names and modes from --extra-template-data into generated @field_validator calls, so a quote can terminate the intended string and add a Python expression. Execution occurs only when Pydantic v2 output is generated from attacker-influenced extra template data and the resulting module is imported, granting code execution in the developer or CI process.

The record

CVE
CVE-2026-54656
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
koxudaxi
Product
datamodel-code-generator
Classifications
CWE-94, T1059.006
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.52.1, < 0.60.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

koxudaxi · datamodel-code-generatorversion=>= 0.52.1, < 0.60.2

Published CVSS scores

7.8GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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