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CVE-2026-106440— Hydra: Optuna custom_search_space can resolve and execute untrusted callables via get_method

Quick assessment

Affected
hydra-ecosystem hydra
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.

以下是该漏洞描述信息的中文翻译： Hydra 是一个用于优雅配置复杂应用程序的框架。在 1.2.0 至 1.3.0 版本以及 1.4.0.dev10 开发版本中，hydra-optuna-sweeper 包允许通过配置控制 hydra.sweeper.custom_search_space 中的点分路径（dotted path），并使用 hydra.utils.get_method() 解析该路径，随后在 Hydra 控制器进程中调用返回的可执行对象。由于 get_method() 是一个信任输入查找辅助函数，并不

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProduct Version RangeStatus
hydra-ecosystem hydra >= 1.2.0, < 1.3.0 affected
>= 1.4.0.dev4, < 1.4.0.dev10 affected
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I. Basic Information for CVE-2026-106440

Vulnerability Information
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Vulnerability Title
Hydra: Optuna custom_search_space can resolve and execute untrusted callables via get_method
Source: CVE Program / CVE List V5
Vulnerability Description
Hydra is a framework for elegantly configuring complex applications. From 1.2.0 until 1.3.0 and 1.4.0.dev10, the hydra-optuna-sweeper package accepts a configuration-controlled dotted path in hydra.sweeper.custom_search_space, resolves it with hydra.utils.get_method(), and later invokes the returned callable in the Hydra controller process. Because get_method() is a trusted-input lookup helper and does not apply the execution policy used by instantiate(), an attacker who controls Optuna sweep configuration or command-line overrides can select importable Python code for execution with the application's privileges, including bypassing a trusted execution whitelist on affected Hydra 1.4 development releases. This issue is fixed in versions 1.3.0 and 1.4.0.dev10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部可控制的输入来选择类或代码(不安全的反射)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
hydra-ecosystem hydra >= 1.2.0, < 1.3.0 -

II. Public POCs for CVE-2026-106440

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III. Intelligence Information for CVE-2026-106440

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Other References for CVE-2026-106440 (4)

Same Patch Batch · hydra-ecosystem · 2026-10-06 · 4 CVEs total

CVE-2026-106439 8.5 HIGH Hydra: Mutable instantiate policy sets allow target blocklist bypass
CVE-2026-106442 7.8 HIGH Hydra instantiate target blacklist bypasses permit code execution
CVE-2026-106441 7.8 HIGH Hydra logging configuration permits unsafe callable resolution

IV. Related Vulnerabilities

Same product: hydra
Same vendor: hydra-ecosystem
Same weakness: CWE-470

V. Comments for CVE-2026-106440

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