{"id":"CVE-2026-106439","title":"Hydra is a framework for elegantly configuring complex applications","summary":"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 att…","severity":"high","cvss":8.5,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-470","CWE-693"],"vendor":"hydra-ecosystem","product":"hydra","affected":["hydra >= 1.3.4, < 1.3.7","hydra >= 1.4.0.dev4, < 1.4.0.dev10"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T20:17:25.917","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106439","references":[{"url":"https://github.com/hydra-ecosystem/hydra/commit/0dd18084589a3d3e577d1f1a8a48fb485c94a5e6","label":"security-advisories@github.com"},{"url":"https://github.com/hydra-ecosystem/hydra/commit/4720dfca2bde27fa140ec287a05709668fbdf168","label":"security-advisories@github.com"},{"url":"https://github.com/hydra-ecosystem/hydra/releases/tag/v1.3.7","label":"security-advisories@github.com"},{"url":"https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-mwj6-rfh8-7qf4","label":"security-advisories@github.com"},{"url":"https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-mwj6-rfh8-7qf4","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-06T19:48:26.207340Z"},"cvssSource":"cna","ingestedAt":"2026-10-06T19:13:33.855Z","slug":"CVE-2026-106439","body":"## Overview\n\nHydra 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":59,"depthScoreParts":{"impact":46.8,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":216815,"id":"CVE-2026-106439","ts":1791317966702,"field":"exploit_available","old":"false","new":"true"}]}