CVE-2026-108379: high-severity vulnerability in marcosschroh dataclasses-avroschema
dataclasses-avroschema fixed namespaces allow code injection in generated annotations
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.3%
exploitation probability
0.3%top 72% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
marcosschroh · dataclasses-avroschemaRelated CVEs — marcosschroh dataclasses-avroschema
In the same product, most dangerous first.
CVE-2026-108376HIGHdataclasses-avroschema allows code injection through record names in generated default factoriesEPSS 0.5%CVE-2026-108375HIGHdataclasses-avroschema allows code injection through generated field-default literalsEPSS 0.5%CVE-2026-108380HIGHdataclasses-avroschema field documentation allows code injection in generated Pydantic descriptionsEPSS 0.4%CVE-2026-108381HIGHdataclasses-avroschema pydantic-class metadata allows code injection in generated annotationsEPSS 0.4%CVE-2026-108377HIGHdataclasses-avroschema allows code injection through generated Meta.schema_nameEPSS 0.4%CVE-2026-108385HIGHdataclasses-avroschema enum symbols can inject statements through generated member namesEPSS 0.4%