Simdjson

Source repositories

CVE	Sev	Risk	CVSS	EPSS	KEV	Published	Description
CVE-2026-8295	Med	0.45	—	0.00		May 14, 2026	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