RCE in Marcosschroh Dataclasses-Avroschema
CVE-2026-108376
dataclasses-avroschema generates Avro schemas from Python dataclasses, Pydantic models, and Faust Records and generates Python code from Avro schemas. From version 0.47.3 through 0.70.5, FieldRepresentation.get_field_default inserts a schema-controlled referenced record name into the callable position of a generated default_factory lambda without validating it as an Avro name. A crafted record name can become an arbitrary Python expression that executes when an instance of the generated model consumes the field default. Version 0.70.6 fixes the vulnerability by rejecting record names that do not match the Avro name grammar.
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 >= 0.47.3, < 0.70.6, >= 0.38.0, < 0.70.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-108376?
- CVE-2026-108376 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-2026-108376?
- High severity. CVSS v3 base score is 8.8 out of 10.