CVE-2026-32874— UltraJSON 安全漏洞

UltraJSON has a Memory Leak parsing large integers allows DoS

UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Versions 5.4.0 through 5.11.0 contain an accumulating memory leak in JSON parsing large (outside of the range [-2^63, 2^64 - 1]) integers. The leaked memory is a copy of the string form of the integer plus an additional NULL byte. The leak occurs irrespective of whether the integer parses successfully or is rejected due to having more than sys.get_int_max_str_digits() digits, meaning that any sized leak per malicious JSON can be achieved provided that there is no limit on the overall size of the payload. Any service that calls ujson.load()/ujson.loads()/ujson.decode() on untrusted inputs is affected and vulnerable to denial of service attacks. This issue has been fixed in version 5.12.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

在移除最后引用时对内存的释放不恰当(内存泄露)

UltraJSON 安全漏洞

UltraJSON是UltraJSON开源的一个超快的 JSON 编码器和解码器，用纯 C 语言编写，并绑定了 Python 3.7+。 UltraJSON 5.11.0及之前版本存在安全漏洞，该漏洞源于解析大整数时存在内存泄漏，可能导致拒绝服务。

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