{"id":"CVE-2026-71492","summary":"Banks: Path traversal in `DirectoryPromptRegistry.set()` allows arbitrary file write outside the registry root","details":"Banks generates meaningful LLM prompts using a simple template language. Prior to version 2.4.5, DirectoryPromptRegistry.set() in src/banks/registries/directory.py interpolates attacker-controlled Prompt.name and Prompt.version values into a Path without canonicalization or containment validation. Relative traversal such as ../victim/foo and an absolute Prompt.name can escape or discard the configured registry root, while overwrite=True permits replacement of existing target files. The poisoned name is persisted in index.json and reconstructed by _load(), allowing the out-of-root path to survive later registry loads. An application that forwards request data into these fields can therefore write Prompt.raw bytes to attacker-chosen paths writable by the application process. This issue is fixed in version 2.4.5.","aliases":["GHSA-x8wg-4xgc-vr54"],"modified":"2026-08-22T03:58:10.585290581Z","published":"2026-08-20T16:13:55.578Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71492.json"},"references":[{"type":"WEB","url":"https://github.com/masci/banks/releases/tag/v2.4.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71492.json"},{"type":"ADVISORY","url":"https://github.com/masci/banks/security/advisories/GHSA-x8wg-4xgc-vr54"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71492"},{"type":"FIX","url":"https://github.com/masci/banks/commit/a215f6d779966945c56e0af5abed1ae5916fd9d3"},{"type":"FIX","url":"https://github.com/masci/banks/pull/77"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/masci/banks","events":[{"introduced":"0"},{"fixed":"a215f6d779966945c56e0af5abed1ae5916fd9d3"},{"fixed":"ae351d7716451cda07a466646e8bb6556fe600a8"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.4.5"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v2.4.4","v2.4.3","v2.4.2","v2.4.1","v2.4.0","v2.3.0","v2.2.0","v2.1.3","v2.1.2","v2.1.1","v2.1.0","v2.0.0","v1.8.0","v1.7.1","v1.7.0","v1.6.1","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.1","v1.2.0","v1.1.0","v1.0.0","v0.6.0","v0.5.0","v0.4.1","v0.4.0","v0.3.1","v0.3.0","v0.2.0","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71492.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"}]}