CVE-2026-3172 | BDVDB-2026-317249 Detail

pgvector

Description#

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

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

References#

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

Exploit#

No public exploit known

History#

Version 12026-02-25Record published in the CVE List.
Version 22026-02-26Most recent update recorded in the CVE List.

Published

Published: 2026-02-25
Last modified: 2026-02-26

Vendor information

Vendor: Not stated
Product: pgvector

Score

8.1 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 32.9.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 0.8.0 and < 0.8.2
Fixed
0.8.2
Vulnerable
0.7.0
Fixed
Not stated
Vulnerable
0.6.0
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.1 High

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

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

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).