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Vulnerability Details :

CVE-2026-3172

Summary
Assigner-PostgreSQL
Assigner Org ID-f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Published At-25 Feb, 2026 | 20:59
Updated At-26 Feb, 2026 | 15:04
Rejected At-
Credits

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:PostgreSQL
Assigner Org ID:f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Published At:25 Feb, 2026 | 20:59
Updated At:26 Feb, 2026 | 15:04
Rejected At:
▼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
TypeCWE IDDescription
CWECWE-191Integer Underflow or Wraparound
CWECWE-787Out-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
VersionBase scoreBase severityVector
3.18.1HIGH
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations

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

Workarounds
Exploits
Credits
Thanks to chungkn from OneMount Group for reporting this.
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
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
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Published At:25 Feb, 2026 | 21:16
Updated At:27 Feb, 2026 | 14:06

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Type: Secondary
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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-191Secondaryf86ef6dc-4d3a-42ad-8f28-e6d5547a5007
CWE-787Secondaryf86ef6dc-4d3a-42ad-8f28-e6d5547a5007
CWE ID: CWE-191
Type: Secondary
Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
CWE ID: CWE-787
Type: Secondary
Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/pgvector/pgvector/issues/959f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
N/A
Hyperlink: https://github.com/pgvector/pgvector/issues/959
Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Resource: N/A

Change History

0
Information is not available yet

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