hydra-ecosystem Hydra up to 1.2.x/1.4.0.dev9 Utils hydra.utils.get_method custom_search_space code injection

Summaryinfo

A vulnerability described as problematic has been identified in hydra-ecosystem Hydra up to 1.2.x/1.4.0.dev9. This vulnerability affects the function hydra.utils.get_method of the component Utils. The manipulation of the argument custom_search_space results in code injection. This vulnerability is identified as CVE-2026-106440. The attack is only possible with local access. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in hydra-ecosystem Hydra up to 1.2.x/1.4.0.dev9. Affected is the function hydra.utils.get_method of the component Utils. The manipulation of the argument custom_search_space with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-106440 since 10/06/2026. The exploitability is told to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 1.3.0 or 1.4.0.dev10 eliminates this vulnerability.

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Productinfo

Vendor

• hydra-ecosystem

Name

• Hydra

Version

• 1.0
• 1.1
• 1.2
• 1.4.0.dev9

Website

• Product: https://github.com/hydra-ecosystem/hydra/

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