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CVE-2026-106442— Hydra instantiate target blacklist bypasses permit code execution

Quick assessment

Affected
hydra-ecosystem hydra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hydra 是一个用于优雅地配置复杂应用程序的框架。在 1.3.4 至 1.3.6 以及 1.4.0.dev9 版本之间，为应对 CVE-2026-68508 而引入的 目标黑名单，未能完整验证由 字段最终确定的可调用对象。诸如 等执行包装器、通过 实现的二进制数据反序列化、别名、返回可调用的辅助函数、通用分发机制以及延迟调用等机制，可能隐藏或延迟实际的目标对象，从而绕过基于名称的授权检查。攻击者若能使应用程序实例化不受信任的 Hydra 配置，即可利用这些缺陷以应用程序的权限执行任意代码。该问题已在 1.3.6

CVSS 7.8 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
hydra-ecosystem hydra >= 1.3.4, < 1.3.6 affected
>= 1.4.0.dev0, < 1.4.0.dev9 affected
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I. Basic Information for CVE-2026-106442

Vulnerability Information
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Vulnerability Title
Hydra instantiate target blacklist bypasses permit code execution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
hydra-ecosystem hydra >= 1.3.4, < 1.3.6 -

II. Public POCs for CVE-2026-106442

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III. Intelligence Information for CVE-2026-106442

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Other References for CVE-2026-106442 (6)

Same Patch Batch · hydra-ecosystem · 2026-10-06 · 4 CVEs total

CVE-2026-106439 8.5 HIGH Hydra: Mutable instantiate policy sets allow target blocklist bypass
CVE-2026-106440 7.8 HIGH Hydra: Optuna custom_search_space can resolve and execute untrusted callables via get_meth
CVE-2026-106441 7.8 HIGH Hydra logging configuration permits unsafe callable resolution

IV. Related Vulnerabilities

Same product: hydra
Same vendor: hydra-ecosystem
Same weakness: CWE-184

V. Comments for CVE-2026-106442

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