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CVE-2026-44660

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medium advisory

UltraJSON Memory Leak in ujson.dump() on Write Failure (CVE-2026-44660)

A memory leak vulnerability exists in UltraJSON's `ujson.dump()` function; when writing to a file-like object, if the write operation raises an exception, the serialized JSON string object is not properly de-referenced, leading to a memory leak (CVE-2026-44660).

ujson memory leak denial of service python CVE-2026-44660
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