Main Vulnerability Database Vulnerabilities #VU123565

Allocation of Resources Without Limits or Throttling in orjson - CVE-2025-67221

Published: March 5, 2026

Vulnerability identifier: #VU123565

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-67221

CWE-ID: CWE-770

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to orjson.dumps function does not limit recursion for deeply nested JSON documents. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Affected software

orjson
watsonx Code Assistant On Prem

How to mitigate CVE-2025-67221

Install updates from vendor's website.

orjson - update to 3.11.5
watsonx Code Assistant On Prem - update to 5.3.1

External References

https://github.com/ijl/orjson
https://github.com/kpatsakis/orjson_vulnerability

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