CVE-2026-103484: Out-of-bounds Write in pgvector
CVE-2026-103484 is a high-severity vulnerability in the pgvector extension for PostgreSQL. It affects versions prior to 0.8.7 and involves an out-of-bounds write during the IVFFlat index build process. This flaw can allow a database user with privileges to execute arbitrary code on the system.
AI Analysis
Technical Summary
The IVFFlat index build implementation in pgvector versions before 0.8.7 contains an out-of-bounds write vulnerability. This memory corruption issue can be exploited by a database user to achieve arbitrary code execution, potentially compromising the host running the database. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported as of the publication date.
Potential Impact
Successful exploitation permits a database user to write outside the intended memory bounds, leading to arbitrary code execution. This can result in full compromise of the database server, including unauthorized data access, modification, or service disruption.
Mitigation Recommendations
Upgrade pgvector to version 0.8.7 or later where this vulnerability is fixed. Since this is a software vulnerability in a self-hosted extension, patching the affected software version is required to remediate the issue. No vendor advisory or cloud service patching is indicated.
CVE-2026-103484: Out-of-bounds Write in pgvector
Description
CVE-2026-103484 is a high-severity vulnerability in the pgvector extension for PostgreSQL. It affects versions prior to 0.8.7 and involves an out-of-bounds write during the IVFFlat index build process. This flaw can allow a database user with privileges to execute arbitrary code on the system.
CVSS v3.1
Score 8.8high
Affected software
pgvector
pkg:github/pgvector/pgvectorRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The IVFFlat index build implementation in pgvector versions before 0.8.7 contains an out-of-bounds write vulnerability. This memory corruption issue can be exploited by a database user to achieve arbitrary code execution, potentially compromising the host running the database. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported as of the publication date.
Potential Impact
Successful exploitation permits a database user to write outside the intended memory bounds, leading to arbitrary code execution. This can result in full compromise of the database server, including unauthorized data access, modification, or service disruption.
Mitigation Recommendations
Upgrade pgvector to version 0.8.7 or later where this vulnerability is fixed. Since this is a software vulnerability in a self-hosted extension, patching the affected software version is required to remediate the issue. No vendor advisory or cloud service patching is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PostgreSQL
- Date Reserved
- 2026-09-30T16:24:57.108Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abebc2da43b0b3b89f67a38
Added to database: 10/01/2026, 20:01:49 UTC
Last enriched: 10/01/2026, 20:16:15 UTC
Last updated: 10/01/2026, 21:06:09 UTC
Views: 5
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