CVE-2026-108380highCWE-94

CVE-2026-108380: high-severity vulnerability in marcosschroh dataclasses-avroschema

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

Published

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.4%
exploitation probability
0.4%top 61% of all CVEs
observed exploitation
nono source reports it
dataclasses-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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
marcosschroh · dataclasses-avroschema
Related CVEs — marcosschroh dataclasses-avroschema

In the same product, most dangerous first.

CVE-2026-108376HIGHdataclasses-avroschema allows code injection through record names in generated default factoriesEPSS 0.5%CVE-2026-108375HIGHdataclasses-avroschema allows code injection through generated field-default literalsEPSS 0.5%CVE-2026-108381HIGHdataclasses-avroschema pydantic-class metadata allows code injection in generated annotationsEPSS 0.4%CVE-2026-108377HIGHdataclasses-avroschema allows code injection through generated Meta.schema_nameEPSS 0.4%CVE-2026-108385HIGHdataclasses-avroschema enum symbols can inject statements through generated member namesEPSS 0.4%CVE-2026-108382HIGHdataclasses-avroschema allows code injection through generated enum-symbol string literalsEPSS 0.4%
References
https://github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c65e2ef832daed5ff91318fchttps://github.com/marcosschroh/dataclasses-avroschema/pull/843https://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-g7p7-mgvm-jw7p