{"id":"CVE-2026-106440","summary":"Hydra: Optuna custom_search_space can resolve and execute untrusted callables via get_method","details":"Hydra is a framework for elegantly configuring complex applications. From 1.2.0 until 1.3.0 and 1.4.0.dev10, the hydra-optuna-sweeper package accepts a configuration-controlled dotted path in hydra.sweeper.custom_search_space, resolves it with hydra.utils.get_method(), and later invokes the returned callable in the Hydra controller process. Because get_method() is a trusted-input lookup helper and does not apply the execution policy used by instantiate(), an attacker who controls Optuna sweep configuration or command-line overrides can select importable Python code for execution with the application's privileges, including bypassing a trusted execution whitelist on affected Hydra 1.4 development releases. This issue is fixed in versions 1.3.0 and 1.4.0.dev10.","aliases":["GHSA-5jjj-9xc3-rm56"],"modified":"2026-10-07T10:45:40.942490087Z","published":"2026-10-06T18:51:37.549Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"1.4.0.dev4"},{"fixed":"1.4.0.dev10"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-470"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106440.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106440.json"},{"type":"FIX","url":"https://github.com/hydra-ecosystem/hydra/commit/0dd18084589a3d3e577d1f1a8a48fb485c94a5e6"},{"type":"FIX","url":"https://github.com/hydra-ecosystem/hydra/commit/4720dfca2bde27fa140ec287a05709668fbdf168"},{"type":"WEB","url":"https://github.com/hydra-ecosystem/hydra/releases/tag/v1.3.7"},{"type":"ADVISORY","url":"https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-5jjj-9xc3-rm56"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106440"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hydra-ecosystem/hydra","events":[{"introduced":"66c3b37bffde8a0b00258d032505eef7b5720fd4"},{"fixed":"273ce9c6e1bd54cfb0b594a4a924a4d3c9b5425f"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.2.0"},{"fixed":"1.3.0"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106440.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}