What is CVE-2026-3172?

CVE-2026-3172 is a high-severity vulnerability in Pgvector, classified under Integer Underflow. CVSS score: 8.1/10. Published 2026-02-25.

How severe is CVE-2026-3172?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Pgvector

CVE-2026-3172

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.

EPSS: 0.003 (18.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

N/a Pgvector — versions 0.8.0, 0.7.0, 0.6.0

Weakness classification (CWE)

CWE-191 — Integer Underflow
CWE-787 — Out-of-bounds Write

References

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Frequently asked questions

What is CVE-2026-3172?: CVE-2026-3172 is a high-severity vulnerability in Pgvector, classified under Integer Underflow. CVSS score: 8.1/10. Published 2026-02-25.
How severe is CVE-2026-3172?: High severity. CVSS v3 base score is 8.1 out of 10.