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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18022
StatePUBLISHED
AssignerPostgreSQL
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-29 20:17:02 UTC
Updated2026-08-20 13:15:02 UTC
DescriptionInteger 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

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

EPSS: 0.003340000 probability, percentile 0.264270000 (date 2026-08-23)

Problem Types: CWE-190 | CWE-787 | CWE-190 Integer Overflow or Wraparound | CWE-787 Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1f86ef6dc-4d3a-42ad-8f28-e6d5547a5007Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Pgvector Project Pgvector All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Pgvector affected 0.8.6 semver Not specified

References

ReferenceSourceLinkTags
github.com/pgvector/pgvector/issues/1006 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 github.com Issue Tracking, Vendor Advisory
github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708a... f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 github.com Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Thanks to 0xJi3F for reporting this. (en)

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