Read the docs
TI-2026-71961 Aliases CVE-2026-108375

Code injection in dataclasses-avroschema via schema field defaults

Priority HIGH 73CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-94.

Summary

dataclasses-avroschema from 0.38.0 before 0.70.6 inserts schema-controlled field defaults into quoted literals in generated Python code without escaping them (CWE-94). A remote attacker who supplies a crafted default can inject statements that run when the generated module is imported, and user interaction is required.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

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, FieldRepresentation.get_field_default inserts schema-controlled string, UUID, bytes, and fixed field defaults into quoted literals in generated Python source without escaping them. A crafted default can terminate the literal and inject statements into the generated module, which execute when the module is imported. Version 0.70.6 fixes the vulnerability by escaping schema values rendered into generated string literals.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00464 40th percentileScored 2026-11-07
Fix Fixed dataclasses-avroschema (marcosschroh): 0.70.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
marcosschrohdataclasses-avroschema0.38.0 to before 0.70.60.70.6Patch availableCNA
  • dataclasses-avroschema Vendormarcosschroh Affected 0.38.0 to before 0.70.6 Fixed in 0.70.6 Patch available CNA

Remediation

Upgrade dataclasses-avroschema to version 0.70.6, which escapes schema values rendered into generated string literals.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

  • Fix · CNA dataclasses-avroschema (marcosschroh) Fixed in 0.70.6

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-108375

References

Other 3

  • TI-2026-71971 Code injection in dataclasses-avroschema enum generation CVSS 3.1HIGH 8.8
  • TI-2026-71968 Code injection in dataclasses-avroschema through enum symbol literals CVSS 3.1HIGH 8.8
  • TI-2026-71967 Code injection in dataclasses-avroschema Pydantic model generation CVSS 3.1HIGH 8.8
  • TI-2026-71966 Code injection in dataclasses-avroschema Pydantic field documentation CVSS 3.1HIGH 8.8
  • TI-2026-71964 Code injection in dataclasses-avroschema generated class docstrings CVSS 3.1HIGH 8.8
  • TI-2026-71963 Code injection in dataclasses-avroschema through Meta.schema_name CVSS 3.1HIGH 8.8
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences