Package impact

python PyPI / ujson

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CVE Severity CVSS Risk Flags OS Vendor Published Description
CVE-2026-44660 high 8.0 17d ago 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.dump() writes to a file-like object and the write operation raises an excepti…
CVE-2026-32875 unknown 2mo ago UltraJSON has an integer overflow handling large indent leads to buffer overflow or infinite loop
CVE-2026-32874 unknown 2mo ago UltraJSON has a Memory Leak parsing large integers allows DoS
CVE-2022-31116 unknown 4y ago Incorrect handling of invalid surrogate pair characters
CVE-2022-31117 unknown 4y ago Potential double free of buffer during string decoding
CVE-2021-45958 unknown 4y ago UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation.