Buffer Overrun Vulnerability in PostgreSQL Database Software
CVE-2026-2006

8.8HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
12 February 2026

Badges

🔥 Trending now📈 Trended📈 Score: 1,780

What is CVE-2026-2006?

CVE-2026-2006 is a buffer overrun vulnerability found in the PostgreSQL database software, a widely used open-source relational database management system. This vulnerability stems from inadequate validation of multibyte character lengths during text manipulation, which allows users with database access to craft specific queries that can lead to buffer overruns. This potentially enables the execution of arbitrary code with the same privileges as the user running the database server. Affected versions include those prior to PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21. The ramifications of this vulnerability can be severe, as it compromises the integrity and security of the database, exposing organizations to significant risks including data breaches and system manipulation.

Potential impact of CVE-2026-2006

  1. Arbitrary Code Execution: The primary risk associated with CVE-2026-2006 is the potential for attackers to execute arbitrary code on the database server. This can facilitate unauthorized access to sensitive data, manipulation of database contents, or further compromise of the underlying operating system.

  2. Data Breaches: With the ability to execute arbitrary code, malicious actors can extract sensitive information from the database, leading to potential data breaches. This can have severe consequences for businesses, including loss of customer trust, legal implications, and financial penalties.

  3. System Compromise: The vulnerability can lead to broader system compromises beyond just the database. By leveraging the database's execution privileges, attackers may pivot to other systems on the network, further undermining an organization’s overall security posture.

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Affected Version(s)

PostgreSQL 18 < 18.2

PostgreSQL 17 < 17.8

PostgreSQL 16 < 16.12

References

https://www.postgresql.org/support/security/CVE-2026-2006/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 📈

    Vulnerability started trending

  • Vulnerability published

  • Vulnerability Reserved

Credit

The PostgreSQL project thanks Paul Gerste and Moritz Sanft, as part of zeroday.cloud, for reporting this problem.
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