CVE-2026-8295
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
- Score
- CVSS 4.0 6.9 Medium
- Status
- Deferred - cvd@cert.pl
- Published
- 2026-05-14
- Last modified
- 2026-05-14
- Weaknesses
- CWE-190
Affected products
References
- https://cert.pl/posts/2026/05/CVE-2026-8295
- https://github.com/simdjson/simdjson/releases/tag/v4.6.4
