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[ CVE-2026-106442 · Published 6 Oct 2026 ]

Hydra instantiate target blacklist bypasses permit code execution

CVSS 7.8 EPSS <1%Fix available

[ Description ]Official description

Hydra is a framework for elegantly configuring complex applications. From 1.3.4 until 1.3.6 and 1.4.0.dev9, the instantiate() target blacklist introduced for CVE-2026-68508 incompletely checks the effective callable selected by the target field. Execution wrappers such as timeit.timeit, executable deserialization through pickle.loads, aliases, callable-returning helpers, generic dispatch, and deferred calls can obscure or defer the effective target and bypass name-based authorization. An attacker who causes an application to instantiate untrusted Hydra configuration can use these gaps to execute code with the application's privileges. This issue is fixed in versions 1.3.6 and 1.4.0.dev9.

[ Fixes ]Fixes and patches

  • hydra-core 1.3.6Fixed version · GitHub Advisories · pip package hydra-core: upgrade to 1.3.6 or later (affected >= 1.3.4, < 1.3.6)
  • hydra-core 1.4.0.dev9Fixed version · GitHub Advisories · pip package hydra-core: upgrade to 1.4.0.dev9 or later (affected >= 1.4.0.dev0, < 1.4.0.dev9)

[ Packages ]Affected open-source packages

[ References ]References