CVE-2026-3172CWE-191CWE-787

pgvector buffer overflow in parallel HNSW index build

High · published February 25, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
46.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00579 · 46.9th percentile
Weaknesses
CWE-191 · Integer Underflow (Wrap or Wraparound); CWE-787 · Out-of-bounds Write
Published
2026-02-25T20:59Z
EPSS history
Timeline
  • 25 FEB 20:59Z
    pgvector buffer overflow in parallel HNSW index build
    cvelistv5