CVE-2026-8295

Описание

An integer overflow vulnerability in the simdjson document-builder API allows incorrect buffer size calculations in "string_builder::escape_and_append()" when processing very large input strings on platforms with limited "size_t" width (e.g., 32-bit builds). The overflow can cause insufficient buffer allocation, leading to out-of-bounds memory reads in SIMD routines and potentially resulting in information disclosure, memory corruption, or malformed JSON output. This vulnerability has been fixed in 4.6.4 release

A flaw was found in simdjson, a JSON parsing library. An integer overflow vulnerability in the document-builder API, specifically within the string_builder::escape_and_append() function, can occur when processing very large input strings on systems with limited size_t width, such as 32-bit builds. This overflow can lead to incorrect buffer size calculations and insufficient memory allocation. Consequently, this may result in out-of-bounds memory reads during SIMD (Single Instruction, Multiple Data) operations, potentially causing information disclosure, memory corruption, or malformed JSON output.