hydra-ecosystem Hydra up to 1.3.6 Target Policy target_policy.py instantiate privileges management

Summaryinfo

A vulnerability labeled as critical has been found in hydra-ecosystem Hydra up to 1.3.6. Affected by this issue is the function instantiate of the file target_policy.py of the component Target Policy. Executing a manipulation can lead to privileges management. The identification of this vulnerability is CVE-2026-106439. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in hydra-ecosystem Hydra up to 1.3.6. It has been declared as critical. This vulnerability affects the function instantiate of the file target_policy.py of the component Target Policy. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Hydra is a framework for elegantly configuring complex applications. From 1.3.4 until 1.3.7 and 1.4.0.dev10, Hydra stores legacy instantiate target blocklists and related execution-policy collections in mutable module-level state. An attacker who controls multiple sibling target entries can resolve hydra._internal.target_policy.UNCONTROLLED_EXECUTION_TARGETS.discard through instantiate(), remove a denied target, and then invoke that target because sibling nodes are processed in insertion order against the same modified policy. The mutation persists in process-global state and can enable code execution with the application's privileges, while a narrow execution whitelist supplied by trusted Python code is not bypassed by the reported direct mutation path. This issue is fixed in versions 1.3.7 and 1.4.0.dev10.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-106439 since 10/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 1.3.7 or 1.4.0.dev10 eliminates this vulnerability.

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Productinfo

Vendor

• hydra-ecosystem

Name

• Hydra

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5
• 1.3.6

Website

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

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