CVE-2026-3172

Buffer overflow in parallel HNSW index build in pgvector 0.6.0 through 0.8.1 allows a database user to leak sensitive data from other relations or crash the database server.

Database specific

{
    "cwe_ids": [
        "CWE-191",
        "CWE-787"
    ],
    "cna_assigner": "PostgreSQL",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3172.json"
}

References

Affected packages

Git / github.com/pgvector/pgvector

Affected ranges

Type

GIT

Repo

https://github.com/pgvector/pgvector

Events

Introduced

2627c5ff775ae6d7aef0c430121ccf857842d2f2

Fixed

cab9da72c04353f143bb06b42ab70a403daac64a

Introduced

3849f0fd3d6f7916de26d43e3a3c9f8e6615bc8f

Last affected

281d4fcf60e2f037fa09d62be2543bb4d7511f2b

Database specific

{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0.8.0"
        },
        {
            "fixed": "0.8.2"
        },
        {
            "introduced": "0.7.0"
        },
        {
            "last_affected": "0.7.0"
        },
        {
            "introduced": "0.6.0"
        },
        {
            "last_affected": "0.6.0"
        }
    ]
}

Affected versions

0.*

0.6.0

0.7.0

v0.*

v0.8.0

v0.8.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3172.json"

vanir_signatures_modified

"2026-08-07T21:53:36Z"

vanir_signatures

[
    {
        "digest": {
            "line_hashes": [
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                "158760423621449773580808045031918353392"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2026-3172-319708fc",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/pgvector/pgvector/commit/cab9da72c04353f143bb06b42ab70a403daac64a",
        "target": {
            "file": "src/vector.c"
        }
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]