High severity · published Oct 13, 2026
CVE-2026-108380
dataclasses-avroschema field documentation allows code injection in generated Pydantic descriptions
8.8
CVSS
0.4%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DA
dataclasses-avroschema · marcosschroh
>= 0.65.9, < 0.70.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108380
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-108380
x_refsource_CONFIRM
https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-g7p7-mgvm-jw7p
x_refsource_MISC
https://github.com/marcosschroh/dataclasses-avroschema/pull/843
x_refsource_MISC
https://github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c65e2ef832daed5ff91318fc
x_refsource_MISC
https://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6
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