Vulnerability · Published Jul 29, 2026 · Assigned by PostgreSQL
CVE-2026-18022pgvector buffer overflow via integer wraparound in IVFFlat index build on 32-bit systems
High 8.8
In plain English
A high-severity integer overflow in pgvector. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.6%top 51.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | pgvector | no fix listed | DEBIAN-CVE-2026-18022 |
| Debian:14 | pgvector | 0.8.6-1 | DEBIAN-CVE-2026-18022 |
| Ubuntu:24.04:LTS | pgvector | no fix listed | UBUNTU-CVE-2026-18022 |
| Ubuntu:26.04:LTS | pgvector | no fix listed | UBUNTU-CVE-2026-18022 |
| Ubuntu:26.10 | pgvector | no fix listed | UBUNTU-CVE-2026-18022 |
Affected products (as reported)
Weakness: CWE-190, CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H