Known Vulnerabilities for Ultrajson by Ultrajson Project

Listed below are 4 of the newest known vulnerabilities associated with "Ultrajson" by "Ultrajson Project".

These CVEs are retrieved based on exact matches on listed software, hardware, and vendor information (CPE data) as well as a keyword search to ensure the newest vulnerabilities with no officially listed software information are still displayed.

Data on known vulnerable versions is also displayed based on information from known CPEs

Known Vulnerabilities

CVE Shortened Description Severity Publish Date Last Modified
CVE-2026-54911 json UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.13.0, ujson.dumps() ... Not Provided 2026-06-22 2026-06-23
CVE-2026-44660 json UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dum... Not Provided 2026-05-27 2026-05-30
CVE-2022-31117 json UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. In versions prior to 5.4.0 an e... 5.9 - MEDIUM 2022-07-05 2023-11-07
CVE-2022-31116 json UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Affected versions were found to... 7.5 - HIGH 2022-07-05 2023-11-07
CVE-2021-45958 json UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). E... 5.5 - MEDIUM 2022-01-01 2023-11-07
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