RCE in Marcosschroh Dataclasses-Avroschema
CVE-2026-108383
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 renders a schema-controlled enum field default as an enum member reference after applying case conversion but without validating it as an identifier. Newlines, operators, and punctuation can escape the intended reference and inject constrained statements into the generated module, allowing namespace modification or preventing the module from loading. Version 0.70.6 fixes the vulnerability by validating enum defaults as names.
Vulnerability class: RCE (Remote Code Execution)
Published .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Marcosschroh Dataclasses-Avroschema — versions >= 0.38.0, < 0.70.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-108383?
- CVE-2026-108383 is a high-severity vulnerability in Marcosschroh Dataclasses-Avroschema, classified under Code Injection. CVSS score: 8.8/10. Published 2026-10-13.
- How severe is CVE-2026-108383?
- High severity. CVSS v3 base score is 8.8 out of 10.