CVE-2026-18022

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

State: Published
Severity: 8.8 High
Published: Jul 29, 2026
Updated: Oct 7, 2026
Reserved: Jul 28, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	PostgreSQL

Weaknesses

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

Affected Products

Product	Versions
pgvectorn/a	before 0.8.6Affected

References

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

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