CVE-2026-18022
pgvector buffer overflow via integer wraparound in IVFFlat index build on 32-bit systems
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.
INFO
Published Date :
July 29, 2026, 8:17 p.m.
Last Modified :
July 29, 2026, 8:17 p.m.
Remotely Exploit :
Yes !
Source :
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Affected Products
The following products are affected by CVE-2026-18022
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update pgvector to version 0.8.6 or later.
- Apply this fix to all 32-bit systems.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18022.
| URL | Resource |
|---|---|
| https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104 | |
| https://github.com/pgvector/pgvector/issues/1006 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18022 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18022
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18022 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18022 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Jul. 29, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n/a', 'product': 'pgvector', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.8.6', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-787 Added CWE CWE-190 Added Reference https://github.com/pgvector/pgvector/commit/636a92a3395d2e036ffd40d07aeb400a708ae104 Added Reference https://github.com/pgvector/pgvector/issues/1006 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 29, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-18022', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-29T19:30:55.465765Z'}