CVE-2026-8295

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Source
https://cve.org/CVERecord?id=CVE-2026-8295
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8295.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-8295
Published
2026-05-14T10:27:41.953Z
Modified
2026-08-12T16:09:27.787366Z
Severity
  • 6.9 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Integer overflow in simdjson
Details

An integer overflow vulnerability in the simdjson document-builder API allows incorrect buffer size calculations in "stringbuilder::escapeandappend()" when processing very large input strings on platforms with limited "sizet" 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

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

Affected packages

Git / github.com/simdjson/simdjson

Affected ranges

Type
GIT
Repo
https://github.com/simdjson/simdjson
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1bcf71bd85059ab6574ea1159de9298dcc1212c5
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.6.4"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

3.*
3.1.0
v0.*
v0.0.1
v0.1.0
v0.1.1
v0.1.2
v0.2.0
v0.2.1
v0.3.0
v0.3.1
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.4.4
v0.4.5
v0.4.6
v0.5.0
v0.6.0
v0.7.0
v0.8.0
v0.9.0
v0.9.1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.0.3
v2.0.4
v2.1.0
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v3.*
v3.0.0
v3.0.1
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.1.7
v3.1.8
v3.10.0
v3.10.1
v3.11.0
v3.11.1
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.6
v3.12.0
v3.12.1
v3.12.2
v3.12.3
v3.13.0
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.3.0
v3.4.0
v3.5.0
v3.6.0
v3.6.1
v3.6.2
v3.6.3
v3.6.4
v3.7.0
v3.7.1
v3.8.0
v3.9.0
v3.9.1
v3.9.2
v3.9.3
v3.9.4
v3.9.5
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.0.4
v4.0.5
v4.0.6
v4.0.7
v4.2.0
v4.2.1
v4.2.2
v4.2.3
v4.2.4
v4.3.0
v4.3.1
v4.4.0
v4.4.1
v4.4.2
v4.5.0
v4.6.0
v4.6.1
v4.6.2
v4.6.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8295.json"
vanir_signatures 
[
    {
        "target": {
            "file": "include/simdjson/simdjson_version.h"
        },
        "deprecated": false,
        "source": "https://github.com/simdjson/simdjson/commit/1bcf71bd85059ab6574ea1159de9298dcc1212c5",
        "id": "CVE-2026-8295-7016d824",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "68691394554886287224722116579703550222",
                "124243843359062960238746010393758146993",
                "189502068112682671981233448028861102316",
                "263624440430312593385061289147693348190",
                "83573759103621282111731323779323055101"
            ]
        },
        "signature_type": "Line"
    },
    {
        "target": {
            "file": "singleheader/simdjson.h"
        },
        "deprecated": false,
        "source": "https://github.com/simdjson/simdjson/commit/1bcf71bd85059ab6574ea1159de9298dcc1212c5",
        "id": "CVE-2026-8295-c8de94b0",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "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",
                "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",
                "227853308103051091101585429750731956952",
                "111156334025464072307677366122754140621",
                "56075733729932816983646871968506443871"
            ]
        },
        "signature_type": "Line"
    }
]
vanir_signatures_modified 
"2026-08-12T16:09:27Z"