Facebook Research Hydra up to 1.3.3 Instantiate _instantiate2.py hydra.utils.instantiate code injection

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Facebook Research Hydra up to 1.3.3. This vulnerability affects the function hydra.utils.instantiate of the file hydra/_internal/instantiate/_instantiate2.py of the component Instantiate. The manipulation leads to code injection. This vulnerability is traded as CVE-2026-68508. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability was found in Facebook Research Hydra up to 1.3.3. It has been rated as problematic. This issue affects the function hydra.utils.instantiate of the file hydra/_internal/instantiate/_instantiate2.py of the component Instantiate. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Hydra is a framework for elegantly configuring complex applications. Prior to 1.3.4, hydra.utils.instantiate() resolves and calls Python objects selected by configuration through _resolve_target() in hydra/_internal/instantiate/_instantiate2.py, allowing attacker-controlled target values and arguments to choose dangerous callables. A consuming application, library, CLI workflow, or model loader that passes untrusted configuration, CLI overrides, or model metadata into hydra.utils.instantiate() can therefore execute arbitrary code in its own process, including reading or modifying files and credentials or terminating the process. Version 1.3.4 adds target blocking with an explicit HYDRA_INSTANTIATE_ALLOWLIST_OVERRIDE escape hatch. This issue is fixed in version 1.3.4.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-68508 since 07/30/2026. The exploitation is known to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/21/2026). The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 1.3.4 eliminates this vulnerability.

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Productinfo

Type

• Social Network Software

Vendor

• Facebook Research

Name

• Hydra

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3

License

• free

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CPE 2.2info

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