RCE in Marcosschroh Dataclasses-Avroschema
CVE-2026-108379
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, BaseGenerator.parse_fixed inserts a fixed type's namespace value between quotes inside a generated types.confixed annotation without escaping or validating it. A crafted quote can terminate the namespace string and alter the surrounding annotation expression, which Python evaluates when the generated class is defined, allowing arbitrary code execution. Version 0.70.6 fixes the vulnerability by requiring the namespace to be a dot-separated sequence of valid Avro names.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
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-2026-108379?
- CVE-2026-108379 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-2026-108379?
- High severity. CVSS v3 base score is 8.8 out of 10.