CVE-2026-108376: high-severity vulnerability in marcosschroh dataclasses-avroschema
dataclasses-avroschema allows code injection through record names in generated default factories
Published · Updated
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 0.4%
exploitation probability
0.4%top 69% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
dataclasses-avroschema generates Avro schemas from Python dataclasses, Pydantic models, and Faust Records and generates Python code from Avro schemas. From version 0.47.3 through 0.70.5, FieldRepresentation.get_field_default inserts a schema-controlled referenced record name into the callable position of a generated default_factory lambda without validating it as an Avro name. A crafted record name can become an arbitrary Python expression that executes when an instance of the generated model consumes the field default. Version 0.70.6 fixes the vulnerability by rejecting record names that do not match the Avro name grammar.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
marcosschroh · dataclasses-avroschemapublic PoCs found — 1
cve_referencehackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/cve-2026-110113-publiccms-trade-address-save-cross-user-overwriteunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — marcosschroh dataclasses-avroschema
In the same product, most dangerous first.
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-2026-108377HIGHdataclasses-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%CVE-2026-108382HIGHdataclasses-avroschema allows code injection through generated enum-symbol string literalsEPSS 0.4%CVE-2026-108384HIGHdataclasses-avroschema allows code injection through fixed-type aliases supplied as a bare stringEPSS 0.3%
References
https://github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c65e2ef832daed5ff91318fchttps://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-jcjg-gjg5-xp7vhttps://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/cve-2026-110113-publiccms-trade-address-save-cross-user-overwrite