High 8.8Published Oct 13, 2026

CVE-2026-108384dataclasses-avroschema allows code injection through fixed-type aliases supplied as a bare string

Updated under an hour ago (2026-10-19 10:00 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 interpolates a fixed type's aliases value directly into a generated types.confixed annotation. A list is represented with quoted entries, but a bare string is emitted as an unquoted Python expression and evaluated when the generated module is imported, allowing arbitrary code execution from a crafted schema. Version 0.70.6 fixes the vulnerability by rejecting aliases values that are not lists.

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-8j5c-xq6f-2c43x-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.