CVE-2026-106439

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/hydra-ecosystem/hydra/commit/0dd18084589a3d3e577d1f1a8a48fb485c94a5e6
https://github.com/hydra-ecosystem/hydra/commit/4720dfca2bde27fa140ec287a05709668fbdf168
https://github.com/hydra-ecosystem/hydra/releases/tag/v1.3.7
https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-mwj6-rfh8-7qf4
https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-mwj6-rfh8-7qf4

Configurations

No configuration.

History

06 Oct 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-mwj6-rfh8-7qf4 -~~	() https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-mwj6-rfh8-7qf4 -

06 Oct 2026, 19:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 19:18

Updated : 2026-10-06 20:17

NVD link : CVE-2026-106439

Mitre link : CVE-2026-106439

CVE.ORG link : CVE-2026-106439

JSON object : View

Products Affected

No product.

CWE

CWE-470

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

CWE-693

Protection Mechanism Failure

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