Arbitrary Code Execution Vulnerability in dataclasses-avroschema by Marcosschroh
CVE-2026-108384

8.8HIGH

Key Information:

Vendor

Marcosschroh

Status
Dataclasses-avroschema
Vendor
CVE Published:
13 October 2026

What is CVE-2026-108384?

A vulnerability exists in the dataclasses-avroschema package where the BaseGenerator class improperly processes fixed types. When generating Python code from Avro schemas, it fails to properly handle the interpolation of alias values, leading to the potential for arbitrary code execution through crafted schemas. This issue affects versions ranging from 0.38.0 to 0.70.5. The vulnerability has been addressed in version 0.70.6, which enhances security by rejecting non-list alias values, thereby preventing untrusted input from being executed.

Affected Version(s)

dataclasses-avroschema >= 0.38.0, < 0.70.6

References

https://github.com/marcosschroh/dataclasses-avroschema/se...
x_refsource_CONFIRM
https://github.com/marcosschroh/dataclasses-avroschema/co...
x_refsource_MISC
https://github.com/marcosschroh/dataclasses-avroschema/re...
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.