CVE-2025-67221: orjson does not limit recursion for deeply nested JSON documents

January 22, 2026 (updated March 12, 2026)

The orjson.dumps function in orjson before 3.11.6 does not limit recursion for deeply nested JSON documents.

References

github.com/advisories/GHSA-hx9q-6w63-j58v
github.com/ijl/orjson
github.com/ijl/orjson/commit/62bb185b70785ded49c79c26f8c9781f1e6fe370
github.com/ijl/orjson/issues/620
github.com/kpatsakis/CVE-2025-67221/issues/1
github.com/kpatsakis/orjson_vulnerability
nvd.nist.gov/vuln/detail/CVE-2025-67221

Code Behaviors & Features

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