Vulnerability · Published Oct 13, 2026 · Assigned by GitHub_M
CVE-2026-108377dataclasses-avroschema allows code injection through generated Meta.schema_name
High 8.8
In plain English
A high-severity code injection in dataclasses-avroschema from marcosschroh. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Official description
dataclasses-avroschema generates Avro schemas from Python dataclasses, Pydantic models, and Faust Records and generates Python code from Avro schemas. From version 0.62.3 through 0.70.5, ClassRepresentation.render_metaclass inserts a schema-controlled Avro record name into the quoted Meta.schema_name field of generated Python source without escaping it. A crafted name can terminate the string literal and inject statements into the generated class body, which execute when the generated module is imported. Version 0.70.6 fixes the vulnerability by escaping schema values rendered into generated string literals.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| marcosschroh | dataclasses-avroschema | >= 0.62.3, < 0.70.6 |
Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-57hr-pcm8-p9j9 x_refsource_CONFIRM
- https://github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c65e2ef832daed5ff91318fc x_refsource_MISC
- https://github.com/marcosschroh/dataclasses-avroschema/commit/919d3e07c8938369cfc2c0569007ba373247e74a x_refsource_MISC
- https://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6 x_refsource_MISC