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CVE-2026-108378— dataclasses-avroschema record documentation can terminate generated class docstrings

Quick assessment

Affected
marcosschroh dataclasses-avroschema
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

dataclasses-avroschema 能够从 Python dataclass、Pydantic 模型和 Faust Record 生成 Avro 模式，并从 Avro 模式生成 Python 代码。在 0.40.0 到 0.70.5 版本中， 方法将 Avro 模式记录中的 doc 值直接复制到生成的三重双引号（"""）类文档字符串中，但未对引号或反斜杠进行转义。攻击者可以构造包含三重引号序列的恶意 doc 值，从而提前闭合文档字符串，并在生成的类主体中注入任意语句；同时，末尾的反斜杠还可以转义生成的闭合

CVSS 8.8 · High EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
marcosschroh dataclasses-avroschema >= 0.40.0, < 0.70.6 affected
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I. Basic Information for CVE-2026-108378

Vulnerability Information
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Vulnerability Title
dataclasses-avroschema record documentation can terminate generated class docstrings
Source: CVE Program / CVE List V5
Vulnerability Description
dataclasses-avroschema generates Avro schemas from Python dataclasses, Pydantic models, and Faust Records and generates Python code from Avro schemas. From version 0.40.0 through 0.70.5, ClassRepresentation.render_docstring copies a schema record's doc value into a generated triple-double-quoted class docstring without escaping quotes or backslashes. A crafted triple-quote sequence can close the docstring and inject statements into the generated class body, while a trailing backslash can escape the generated closing delimiter, allowing Python code execution during module import. Version 0.70.6 fixes the vulnerability by escaping quotes, backslashes, and unsafe control characters before rendering docstrings.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
marcosschroh dataclasses-avroschema >= 0.40.0, < 0.70.6 -

II. Public POCs for CVE-2026-108378

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III. Intelligence Information for CVE-2026-108378

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Vendor Advisories for CVE-2026-108378 (1)

Vendor Pages for CVE-2026-108378 (1)

Same Patch Batch · marcosschroh · 2026-10-13 · 11 CVEs total

CVE-2026-108376 8.8 HIGH dataclasses-avroschema allows code injection through record names in generated default fac
CVE-2026-108375 8.8 HIGH dataclasses-avroschema allows code injection through generated field-default literals
CVE-2026-108377 8.8 HIGH dataclasses-avroschema allows code injection through generated Meta.schema_name
CVE-2026-108380 8.8 HIGH dataclasses-avroschema field documentation allows code injection in generated Pydantic des
CVE-2026-108381 8.8 HIGH dataclasses-avroschema pydantic-class metadata allows code injection in generated annotati
CVE-2026-108379 8.8 HIGH dataclasses-avroschema fixed namespaces allow code injection in generated annotations
CVE-2026-108382 8.8 HIGH dataclasses-avroschema allows code injection through generated enum-symbol string literals
CVE-2026-108383 8.8 HIGH dataclasses-avroschema enum field defaults can inject statements into generated modules
CVE-2026-108385 8.8 HIGH dataclasses-avroschema enum symbols can inject statements through generated member names
CVE-2026-108384 8.8 HIGH dataclasses-avroschema allows code injection through fixed-type aliases supplied as a bare

IV. Related Vulnerabilities

Same product: dataclasses-avroschema
Same vendor: marcosschroh
Same weakness: CWE-94

V. Comments for CVE-2026-108378

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