{"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":"2026-08-12T16:09:27.787366Z","published":"2026-05-14T10:27:41.953Z","database_specific":{"cna_assigner":"CERT-PL","cwe_ids":["CWE-190"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8295.json"},"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":{"vanir_signatures":[{"deprecated":false,"digest":{"line_hashes":["68691394554886287224722116579703550222","124243843359062960238746010393758146993","189502068112682671981233448028861102316","263624440430312593385061289147693348190","83573759103621282111731323779323055101"],"threshold":0.9},"id":"CVE-2026-8295-7016d824","signature_type":"Line","signature_version":"v1","source":"https://github.com/simdjson/simdjson/commit/1bcf71bd85059ab6574ea1159de9298dcc1212c5","target":{"file":"include/simdjson/simdjson_version.h"}},{"source":"https://github.com/simdjson/simdjson/commit/1bcf71bd85059ab6574ea1159de9298dcc1212c5","target":{"file":"singleheader/simdjson.h"},"deprecated":false,"digest":{"line_hashes":["190288945664784663071183855366525064331","101635146222028700657121668250153994068","135173973720822426163534305484650131121","68691394554886287224722116579703550222","124243843359062960238746010393758146993","189502068112682671981233448028861102316","263624440430312593385061289147693348190","83573759103621282111731323779323055101","232788422513482647582360793431486139560","320741433767047716374701607509860922119","295182408073718742835810514679078507201","200702879216146266522959961335539522620","57533230060835829448390524078219991064","263582228531173986385785430731707307559","6229512795268710082537567891693462738","227853308103051091101585429750731956952","111156334025464072307677366122754140621","56075733729932816983646871968506443871","232788422513482647582360793431486139560","320741433767047716374701607509860922119","295182408073718742835810514679078507201","200702879216146266522959961335539522620","57533230060835829448390524078219991064","263582228531173986385785430731707307559","6229512795268710082537567891693462738","227853308103051091101585429750731956952","111156334025464072307677366122754140621","56075733729932816983646871968506443871","232788422513482647582360793431486139560","320741433767047716374701607509860922119","295182408073718742835810514679078507201","200702879216146266522959961335539522620","57533230060835829448390524078219991064","263582228531173986385785430731707307559","6229512795268710082537567891693462738","227853308103051091101585429750731956952","111156334025464072307677366122754140621","56075733729932816983646871968506443871","232788422513482647582360793431486139560","320741433767047716374701607509860922119","295182408073718742835810514679078507201","200702879216146266522959961335539522620","57533230060835829448390524078219991064","263582228531173986385785430731707307559","6229512795268710082537567891693462738","227853308103051091101585429750731956952","111156334025464072307677366122754140621","56075733729932816983646871968506443871","232788422513482647582360793431486139560","320741433767047716374701607509860922119","295182408073718742835810514679078507201","200702879216146266522959961335539522620","57533230060835829448390524078219991064","263582228531173986385785430731707307559","6229512795268710082537567891693462738","227853308103051091101585429750731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