High severity · published Oct 13, 2026
CVE-2026-108375
dataclasses-avroschema allows code injection through generated field-default literals
8.8
CVSS
0.5%
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 0.38.0 through 0.70.5, FieldRepresentation.get_field_default inserts schema-controlled string, UUID, bytes, and fixed field defaults into quoted literals in generated Python source without escaping them. A crafted default can terminate the literal and inject statements into the generated module, which execute when the module is imported. Version 0.70.6 fixes the vulnerability by escaping schema values rendered into generated string literals.
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)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DA
dataclasses-avroschema · marcosschroh
>= 0.38.0, < 0.70.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108375
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-108375
x_refsource_CONFIRM
https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-9h8h-264x-jcg2
x_refsource_MISC
https://github.com/marcosschroh/dataclasses-avroschema/commit/01e6d5e15ab0ff69faac39a340d21b85da1e852f
x_refsource_MISC
https://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6
More from dataclasses-avroschema
8.8
CVE-2026-108385
dataclasses-avroschema enum symbols can inject statements through generated member names
8.8
CVE-2026-108384
dataclasses-avroschema allows code injection through fixed-type aliases supplied as a bare string
8.8
CVE-2026-108383
dataclasses-avroschema enum field defaults can inject statements into generated modules
8.8
CVE-2026-108382
dataclasses-avroschema allows code injection through generated enum-symbol string literals
8.8
CVE-2026-108381
dataclasses-avroschema pydantic-class metadata allows code injection in generated annotations