{"id":"CVE-2026-8295","summary":"Integer overflow in simdjson","details":"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.\nThis vulnerability has been fixed in 4.6.4 release","modified":"2026-07-08T08:16:46.319600888Z","published":"2026-05-14T10:27:41.953Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8295.json","cna_assigner":"CERT-PL","cwe_ids":["CWE-190"]},"references":[{"type":"ADVISORY","url":"https://cert.pl/posts/2026/05/CVE-2026-8295"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8295.json"},{"type":"ADVISORY","url":"https://github.com/simdjson/simdjson/releases/tag/v4.6.4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8295"},{"type":"PACKAGE","url":"https://github.com/simdjson/simdjson"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/simdjson/simdjson","events":[{"introduced":"0"},{"fixed":"1bcf71bd85059ab6574ea1159de9298dcc1212c5"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"4.6.4"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v4.6.3","v4.6.2","v4.6.1","v4.6.0","v4.5.0","v4.4.2","v4.4.1","v4.4.0","v4.3.1","v4.3.0","v4.2.4","v4.2.3","v4.2.2","v4.2.1","v4.2.0","v4.0.7","v4.0.6","v4.0.5","v4.0.4","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v3.13.0","v3.12.3","v3.12.2","v3.12.1","v3.12.0","v3.11.6","v3.11.5","v3.11.4","v3.11.3","v3.11.2","v3.11.1","v3.11.0","v3.10.1","v3.10.0","v3.9.5","v3.9.4","v3.9.3","v3.9.2","v3.9.1","v3.9.0","v3.8.0","v3.7.1","v3.7.0","v3.6.4","v3.6.3","v3.6.2","v3.6.1","v3.6.0","v3.5.0","v3.4.0","v3.3.0","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.8","v3.1.7","v3.1.6","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0","3.1.0","v3.0.1","v3.0.0","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.0","v2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v1.1.0","v1.0.2","v1.0.1","v1.0.0","v0.9.1","v0.9.0","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.1","v0.3.0","v0.2.1","v0.2.0","v0.1.2","v0.1.1","v0.1.0","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8295.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}