---
id: CVE-2026-106440
title: Hydra is a framework for elegantly configuring complex applications
summary: >-
  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 i…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-470
vendor: hydra-ecosystem
product: hydra
affected:
  - 'hydra >= 1.2.0, < 1.3.0'
  - 'hydra >= 1.4.0.dev4, < 1.4.0.dev10'
patched:
  - hydra-optuna-sweeper 1.3.0
  - hydra-optuna-sweeper 1.4.0.dev10
published: '2026-10-06'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T02:16:59.577'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106440'
references:
  - url: >-
      https://github.com/hydra-ecosystem/hydra/commit/0dd18084589a3d3e577d1f1a8a48fb485c94a5e6
    label: security-advisories@github.com
  - url: >-
      https://github.com/hydra-ecosystem/hydra/commit/4720dfca2bde27fa140ec287a05709668fbdf168
    label: security-advisories@github.com
  - url: 'https://github.com/hydra-ecosystem/hydra/releases/tag/v1.3.7'
    label: security-advisories@github.com
  - url: >-
      https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-5jjj-9xc3-rm56
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106440'
  - url: 'https://github.com/advisories/GHSA-5jjj-9xc3-rm56'
  - url: 'https://github.com/hydra-ecosystem/hydra'
  - url: 'https://pypi.org/project/hydra-optuna-sweeper'
tags:
  - nvd
  - cve.org
  - ghsa
  - pip
  - osv
epss: 0.00271
epssPercentile: 0.19176
aliases:
  - GHSA-5jjj-9xc3-rm56
  - PYSEC-2026-4224
ecosystem: pip
ingestedAt: '2026-10-06T19:13:33.853Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-09T01:39:29.434404Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-106440)

Affected packages:

- `hydra-optuna-sweeper >= 1.2.0, < 1.3.0`
- `hydra-optuna-sweeper >= 1.4.0.dev4, < 1.4.0.dev10`

Patched in:

- `hydra-optuna-sweeper 1.3.0`
- `hydra-optuna-sweeper 1.4.0.dev10`

Source: https://github.com/advisories/GHSA-5jjj-9xc3-rm56