What is CVE-2026-18022?

CVE-2026-18022 is a high-severity vulnerability in Pgvector Project, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2026-07-29.

How severe is CVE-2026-18022?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Pgvector Project

CVE-2026-18022

Integer wraparound in IVFFlat index build in pgvector before 0.8.6 allows a database user to write data out-of-bounds, which could lead to arbitrary code execution. Only 32-bit systems are affected.

Vulnerability class: Integer Overflow

EPSS: 0.003 (26.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Pgvector_project Pgvector
N/a Pgvector — versions 0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound
CWE-787 — Out-of-bounds Write

References

f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Issue Tracking, Vendor Advisory)
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Patch)

Frequently asked questions

What is CVE-2026-18022?: CVE-2026-18022 is a high-severity vulnerability in Pgvector Project, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2026-07-29.
How severe is CVE-2026-18022?: High severity. CVSS v3 base score is 8.8 out of 10.