VulnerabilityDeferred

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.

HIGH 8.1EPSS 0.32%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS: 0.32% probability · 25th percentile
CISA KEV: Not listed
Weakness: CWE-191, CWE-787
Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.