CVE-2026-18022

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Source
https://cve.org/CVERecord?id=CVE-2026-18022
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18022.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-18022
Downstream
Published
2026-07-29T18:55:54Z
Modified
2026-08-22T09:15:40Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
pgvector buffer overflow via integer wraparound in IVFFlat index build on 32-bit systems
Details

Integer wraparound in IVFFlat index build in pgvector before 0.8.6 allows a database user to write data out-of-bounds, which could lead to arbitrary code execution. Only 32-bit systems are affected.

Database specific 
{
    "cna_assigner": "PostgreSQL",
    "cwe_ids": [
        "CWE-190",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18022.json"
}
References

Affected packages

Git / github.com/pgvector/pgvector

Affected ranges

Type
GIT
Repo
https://github.com/pgvector/pgvector
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8ee86c96f0fd72390f890aa8a336fda6d3ab4c6c
Fixed
636a92a3395d2e036ffd40d07aeb400a708ae104
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:pgvector_project:pgvector:*:*:*:*:*:postgresql:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.6"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.2.7
v0.3.0
v0.3.1
v0.3.2
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.4.4
v0.5.0
v0.5.1
v0.6.0
v0.6.1
v0.6.2
v0.7.0
v0.7.1
v0.7.2
v0.7.3
v0.7.4
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.8.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18022.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "329085292504724943918461616904557508252",
            "length": 4100
        },
        "id": "CVE-2026-18022-5ec89c57",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104",
        "target": {
            "file": "src/ivfkmeans.c",
            "function": "ElkanKmeans"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "254106014391857788056050272837023107210",
                "34496893817453625261447123547990150478",
                "145370114312184736124763071630652976056",
                "306171363503326756789907812980681882020"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-18022-ceedddd2",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/pgvector/pgvector/commit/8ee86c96f0fd72390f890aa8a336fda6d3ab4c6c",
        "target": {
            "file": "src/vector.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "213476760492371781744053316340842841286",
                "260683006695781656823042648565548588297",
                "153625410147375798832024934637607756089",
                "141959024548119317922716273957587397085",
                "68683923418509379215548593895653225396",
                "224638568996935360512912174812753397697",
                "145272983797897247744597925152620362663",
                "2772089553074562554442941599667296853",
                "159118468369887291904664309946890710708",
                "257822789843458663749238089775594790135",
                "53989657463159054242802811260456382351",
                "37296551765579248738226793543615980269"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-18022-d21979f2",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104",
        "target": {
            "file": "src/ivfkmeans.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-22T09:15:40Z"