UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Affected versions were found to improperly decode certain characters. JSON strings that contain escaped surrogate characters not part of a proper surrogate pair were decoded incorrectly. Besides corrupting strings, this allowed for potential key confusion and value overwriting in dictionaries. All users parsing JSON from untrusted sources are vulnerable. From version 5.4.0, UltraJSON decodes lone surrogates in the same way as the standard library's `json` module does, preserving them in the parsed output. Users are advised to upgrade. There are no known workarounds for this issue.
History

Tue, 22 Apr 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2022-07-05T17:35:11.000Z

Updated: 2025-04-22T17:52:13.305Z

Reserved: 2022-05-18T00:00:00.000Z

Link: CVE-2022-31116

cve-icon Vulnrichment

Updated: 2024-08-03T07:11:39.035Z

cve-icon NVD

Status : Modified

Published: 2022-07-05T18:15:08.023

Modified: 2024-11-21T07:03:55.690

Link: CVE-2022-31116

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-07-02T00:00:00Z

Links: CVE-2022-31116 - Bugzilla