CVE-2026-18022: Integer Overflow or Wraparound in pgvector
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.
AI Analysis
Technical Summary
CVE-2026-18022 describes an integer overflow or wraparound issue in the IVFFlat index build process of pgvector before version 0.8.6. On 32-bit systems, this vulnerability permits a database user to perform out-of-bounds writes, which could be exploited to execute arbitrary code. The vulnerability is confirmed with a high CVSS score of 8.8, indicating significant confidentiality, integrity, and availability impacts. No official patch or remediation level is provided in the available data.
Potential Impact
Successful exploitation on affected 32-bit systems can result in arbitrary code execution, compromising confidentiality, integrity, and availability of the database system. This could allow an attacker with database user privileges to escalate control beyond intended boundaries.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users on 32-bit systems should consider restricting database user privileges and monitoring for unusual activity related to IVFFlat index operations. Upgrading to pgvector version 0.8.6 or later is recommended once a patch is confirmed.
CVE-2026-18022: Integer Overflow or Wraparound in pgvector
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.
CVSS v3.1
Score 8.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18022 describes an integer overflow or wraparound issue in the IVFFlat index build process of pgvector before version 0.8.6. On 32-bit systems, this vulnerability permits a database user to perform out-of-bounds writes, which could be exploited to execute arbitrary code. The vulnerability is confirmed with a high CVSS score of 8.8, indicating significant confidentiality, integrity, and availability impacts. No official patch or remediation level is provided in the available data.
Potential Impact
Successful exploitation on affected 32-bit systems can result in arbitrary code execution, compromising confidentiality, integrity, and availability of the database system. This could allow an attacker with database user privileges to escalate control beyond intended boundaries.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users on 32-bit systems should consider restricting database user privileges and monitoring for unusual activity related to IVFFlat index operations. Upgrading to pgvector version 0.8.6 or later is recommended once a patch is confirmed.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PostgreSQL
- Date Reserved
- 2026-07-28T00:20:11.430Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6a53159c2644c7f8f0f0f2
Added to database: 07/29/2026, 19:23:01 UTC
Last enriched: 07/29/2026, 19:37:06 UTC
Last updated: 07/29/2026, 23:54:59 UTC
Views: 8
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