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Vulnerability record · CVE-2024-27454 · published 26 February 2024

CVE-2024-27454: Ijl orjson vulnerability

Ijl · Orjson

orjson.loads in orjson before 3.9.15 does not limit recursion for deeply nested JSON documents.

7.5 CVSS 3.1 High EPSS 1.2% · top 33.1% CWE-674 · CWE-674
7.5CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

orjson.loads in orjson before 3.9.15 does not limit recursion for deeply nested JSON documents.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ijl/orjson/blob/master/CHANGELOG.md#3915 Release Notes
https://github.com/ijl/orjson/commit/b0e4d2c06ce06c6e63981bf0276e4b7c74e5845e Patch
https://github.com/ijl/orjson/issues/458 ExploitIssue Tracking
https://monicz.dev/CVE-2024-27454 Broken Link
https://github.com/ijl/orjson/blob/master/CHANGELOG.md#3915 Release Notes
https://github.com/ijl/orjson/commit/b0e4d2c06ce06c6e63981bf0276e4b7c74e5845e Patch
https://github.com/ijl/orjson/issues/458 ExploitIssue Tracking
https://monicz.dev/CVE-2024-27454 Broken Link

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2025-67221Ijl orjson allocation without limits vulnerabilityThe orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.EPSS 0.64%

Source: NIST National Vulnerability Database (record CVE-2024-27454), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.