CVE-2026-18022

HIGH 8.8

pgvector buffer overflow via integer wraparound in IVFFlat index build on 32-bit systems

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-190 CWE-787
Vendor	n/a
Product	pgvector
Published	Jul 29, 2026
Last Updated	Jul 29, 2026

Stay Ahead of the Next One

Get instant alerts for n/a pgvector

Be the first to know when new high vulnerabilities affecting n/a pgvector are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / pgvector

0 < 0.8.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/pgvector/pgvector/issues/1006 github.com: https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104

Credits

Thanks to 0xJi3F for reporting this.