{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.4.5"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a215f6d779966945c56e0af5abed1ae5916fd9d3"
            },
            {
              "fixed": "ae351d7716451cda07a466646e8bb6556fe600a8"
            }
          ],
          "repo": "https://github.com/masci/banks",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-x8wg-4xgc-vr54"
  ],
  "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"
  },
  "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.",
  "id": "CVE-2026-71492",
  "modified": "2026-08-22T03:31:04.065402722Z",
  "published": "2026-08-20T16:13:55.578Z",
  "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"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Banks: Path traversal in `DirectoryPromptRegistry.set()` allows arbitrary file write outside the registry root"
}