pgvector buffer overflow in IVFFlat index build

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-103484
StatePUBLISHED
AssignerPostgreSQL
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-01 20:17:23 UTC
Updated2026-10-01 20:17:23 UTC
DescriptionIVFFlat index build in pgvector before 0.8.7 allows a database user to write data out-of-bounds, which can lead to arbitrary code execution.

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

Problem Types: CWE-787 | CWE-1284 | CWE-787 Out-of-bounds Write | CWE-1284 Improper Validation of Specified Quantity in Input

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Pgvector affected 0.8.7 semver Not specified

References

ReferenceSourceLinkTags
github.com/pgvector/pgvector/commit/ee00d39ab30c2a7cf9510abf9288c624d91d... f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 github.com
github.com/pgvector/pgvector/issues/1036 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 github.com
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 Emanuele Barbeno, Cyrill Bannwart, Urs Mueller, and Lukasz D of Compass Security for reporting this. (en)

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