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CVE Vulnerability Details :

CVE-2026-3172

PUBLISHED

More Info Official Page

Assigner-PostgreSQL

Assigner Org ID-f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Published At-25 Feb, 2026 | 20:59

Updated At-26 Feb, 2026 | 15:04

▼CVE Numbering Authority (CNA)

pgvector buffer overflow in parallel HNSW index build

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.

Affected Products

Vendor

n/a

Product

pgvector

Default Status

unaffected

Versions

Affected

From 0.8.0 before 0.8.2 (semver)
0.7.0 (semver)
0.6.0 (semver)

Problem Types

Type	CWE ID	Description
CWE	CWE-191	Integer Underflow or Wraparound
CWE	CWE-787	Out-of-bounds Write

Type: CWE

CWE ID: CWE-191

Description: Integer Underflow or Wraparound

Type: CWE

CWE ID: CWE-787

Description: Out-of-bounds Write

Metrics

Version	Base score	Base severity	Vector
3.1	8.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Version: 3.1

Base score: 8.1

Base severity: HIGH

Vector:

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

Configurations

attacker has permission to create or reindex an HNSW index with parallel workers

Credits

Thanks to chungkn from OneMount Group for reporting this.

References

Hyperlink	Resource
https://github.com/pgvector/pgvector/issues/959	N/A

Hyperlink: https://github.com/pgvector/pgvector/issues/959

Resource: N/A

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

Affected Products

Affected

Problem Types

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References

Affected Products

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References