ujson vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary

CVE-2026-54911Mediumujson: UltraJSON: Malformed/Truncated UTF-8 Accepted and Silently Rewritten in ujson.dumps()CVE-2026-44660Highujson: UltraJSON has a Memory Leak in ujson.dump() on Write Failure CVE-2026-32875Highujson: UltraJSON has an integer overflow handling large indent leads to buffer overflow or infinite loop CVE-2026-32874Highujson: UltraJSON has a Memory Leak parsing large integers allows DoS CVE-2022-31116Highujson: Incorrect handling of invalid surrogate pair characters CVE-2022-31117Mediumujson: Potential double free of buffer during string decoding CVE-2021-45958Mediumujson: UltraJSON vulnerable to Out-of-bounds Write

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