Allocation of Resources Without Limits or Throttling in orjson - CVE-2025-67221
Published: March 5, 2026
Vulnerability identifier: #VU123565
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2025-67221
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ijl
Affected software:
orjson
orjson
Detailed vulnerability description
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.
How to mitigate CVE-2025-67221
Install updates from vendor's website.