EUVD-2026-30265
GHSA-fh2w-3fv3-7vw2
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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6DescriptionNVD
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
AnalysisAI
Integer overflow in simdjson's string_builder::escape_and_append() function allows out-of-bounds memory reads in SIMD routines when processing very large input strings on 32-bit platforms, potentially resulting in information disclosure or memory corruption. The vulnerability affects all versions before 4.6.4 and has been patched by the vendor.
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