High 8.8Published Oct 13, 2026

CVE-2026-108379dataclasses-avroschema fixed namespaces allow code injection in generated annotations

Updated under an hour ago (2026-10-19 08:30 UTC)

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It affects marcosschroh dataclasses-avroschema. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.34%, higher than 26% of scored CVEs.

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Every CVE for marcosschroh dataclasses-avroschema

Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.34% (percentile 26)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 13, 2026
First seen by InfoSec Signals: Oct 13, 2026

Affected products

Affected products

marcosschroh dataclasses-avroschema marcosschroh:dataclasses_avroschema (from the name)	from 0.38.0, < 0.70.6	CNA record

References

https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-h9q3-f96w-f88jx-refsource-confirm
https://github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c65e2ef832daed5ff91318fcx-refsource-misc
https://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.