Vulnerability-Lookup

CVE-2026-18022 (GCVE-0-2026-18022)

Vulnerability from cvelistv5 – Published: 2026-07-29 18:55 – Updated: 2026-07-31 03:56

Title

pgvector buffer overflow via integer wraparound in IVFFlat index build on 32-bit systems

Summary

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.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound
CWE-787 - Out-of-bounds Write

Assigner

PostgreSQL

References

2 references

URL	Tags
https://github.com/pgvector/pgvector/issues/1006
https://github.com/pgvector/pgvector/commit/636a9…

Impacted products

1 product

Vendor	Product	Version
n/a	pgvector	Affected: 0 , < 0.8.6 (semver)

Credits

Thanks to 0xJi3F for reporting this.

Show details on NVD website

JSON

To clipboard

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      "title": "pgvector: pgvector: Arbitrary Code Execution via Integer Wraparound",
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GHSA-87HG-XJFG-QH5R

Vulnerability from github – Published: 2026-07-29 21:31 – Updated: 2026-07-29 21:31

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.

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18022"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-29T20:17:02Z",
    "severity": "HIGH"
  },
  "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.",
  "id": "GHSA-87hg-xjfg-qh5r",
  "modified": "2026-07-29T21:31:00Z",
  "published": "2026-07-29T21:31:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18022"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pgvector/pgvector/issues/1006"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

ubuntu-cve-2026-18022

Vulnerability from osv_ubuntu

Published

2026-07-31 00:00

Modified

2026-07-31 00:00

Summary

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.

Severity

8.8 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-18022	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-18022	REPORT
	https://github.com/pgvector/pgvector/issues/1006	REPORT
	https://github.com/pgvector/pgvector/commit/636a9…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "postgresql-16-pgvector",
            "binary_version": "0.6.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "pgvector",
        "purl": "pkg:deb/ubuntu/pgvector@0.6.0-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.4.4-1",
        "0.5.1-1",
        "0.6.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "postgresql-18-pgvector",
            "binary_version": "0.8.1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "pgvector",
        "purl": "pkg:deb/ubuntu/pgvector@0.8.1-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.8.0-1",
        "0.8.1-2"
      ]
    }
  ],
  "aliases": [],
  "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.",
  "id": "UBUNTU-CVE-2026-18022",
  "modified": "2026-07-31T00:00:00Z",
  "published": "2026-07-31T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-18022"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-18022"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/pgvector/pgvector/issues/1006"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-18022"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-18022 (GCVE-0-2026-18022)

GHSA-87HG-XJFG-QH5R

ubuntu-cve-2026-18022

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature