CVE-2026-44660 | BDVDB-2026-335498 Detail

Description#

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 exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1.

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Exploit#

History#

1. Version 12026-05-27Record published in the CVE List.
2. Version 22026-05-30Most recent update recorded in the CVE List.