VULNERABILITY INTELLIGENCE
CVE-2026-8295
EPSS probability0.28%
CISA KEVNot currently listed
Published2026-05-14
Last modified2026-06-17
Description
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
Weakness classification
- cvd@cert.pl: CWE-190