{"cve":"CVE-2024-53848","nvd":{"published":"2024-11-29T19:15:09.290","modified":"2026-06-17T08:09:24.793","status":"Deferred","description":"check-jsonschema is a CLI and set of pre-commit hooks for jsonschema validation. The default cache strategy uses the basename of a remote schema as the name of the file in the cache, e.g. `https://example.org/schema.json` will be stored as `schema.json`. This naming allows for conflicts. If an attacker can get a user to run `check-jsonschema` against a malicious schema URL, e.g., `https://example.evil.org/schema.json`, they can insert their own schema into the cache and it will be picked up and used instead of the appropriate schema. Such a cache confusion attack could be used to allow data to pass validation which should have been rejected. This issue has been patched in version 0.30.0. All users are advised to upgrade. A few workarounds exist: 1. Users can use `--no-cache` to disable caching. 2. Users can use `--cache-filename` to select filenames for use in the cache, or to ensure that other usages do not overwrite the cached schema. (Note: this flag is being deprecated as part of the remediation effort.) 3. Users can explicitly download the schema before use as a local file, as in `curl -LOs https://example.org/schema.json; check-jsonschema --schemafile ./schema.json`","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N","score":7.1},"cwes":["CWE-349"],"references":["https://github.com/python-jsonschema/check-jsonschema/commit/c52714b85e6725b1b24516fbdedacb333b939152","https://github.com/python-jsonschema/check-jsonschema/security/advisories/GHSA-q6mv-284r-mp36"],"products":[],"source":"nvd","synced_at":"2026-10-19T21:57:34.731061660+00:00"},"epss":{"cve":"CVE-2024-53848","score":0.00145,"percentile":0.03713,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-q6mv-284r-mp36","url":"https://osv.dev/vulnerability/GHSA-q6mv-284r-mp36","summary":"check-jsonschema default caching for remote schemas allows for cache confusion","modified":"2026-07-07T17:56:52.820881211Z","packages":[{"ecosystem":"PyPI","name":"check-jsonschema","purl":"pkg:pypi/check-jsonschema","ranges":["<0.30.0"],"fixed":["0.30.0"]}]},{"id":"PYSEC-2026-1245","url":"https://osv.dev/vulnerability/PYSEC-2026-1245","summary":"check-jsonschema default caching for remote schemas allows for cache confusion","modified":"2026-07-07T17:47:25.676491673Z","packages":[{"ecosystem":"PyPI","name":"check-jsonschema","purl":"pkg:pypi/check-jsonschema","ranges":["<0.30.0"],"fixed":["0.30.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}