dataclasses-avroschema field documentation allows code injection in generated Pydantic descriptions

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-108380
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 18:17:17 UTC
Updated2026-10-13 19:18:04 UTC
Descriptiondataclasses-avroschema generates Avro schemas from Python dataclasses, Pydantic models, and Faust Records and generates Python code from Avro schemas. From version 0.65.9 through 0.70.5, PydanticFieldRepresentation.add_field_properties inserts a schema field's doc value between the quotes of a generated pydantic.Field description argument without escaping it. A crafted quote can terminate the string and inject an expression evaluated during generated class definition, allowing arbitrary Python code execution for Pydantic and AvroDantic model generation. Version 0.70.6 fixes the vulnerability by escaping the documentation value before rendering it.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

Problem Types: CWE-94 | CWE-94 CWE-94: Improper Control of Generation of Code ('Code Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Marcosschroh Dataclasses-avroschema affected >= 0.65.9, < 0.70.6 Not specified

References

ReferenceSourceLinkTags
github.com/marcosschroh/dataclasses-avroschema/pull/843 [email protected] github.com
github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6 [email protected] github.com
github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c6... [email protected] github.com
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