CVE-2026-2004 is a high-severity vulnerability affecting the PostgreSQL database system. This vulnerability allows for missing validation of type of input in the intarray extension selectivity estimator function, which can lead to arbitrary code execution by an object creator as the operating system user running the database. The CVSS score assigned to this vulnerability is 8.8, indicating a serious risk level that organizations cannot overlook.
The risk to organizations includes unauthorized access to sensitive data and potential complete system compromise. With the potential for an attacker to execute arbitrary code on the system, the implications could be severe, affecting not only the integrity and confidentiality of data but also the availability of the database services.
Currently, this vulnerability is known to have an exploit available, which increases the urgency for organizations to address it. The affected PostgreSQL versions include those released prior to 18.2, 17.8, 16.12, 15.16, and 14.21. Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability.
Given the high-profile nature of this vulnerability, security teams are advised to assess their environments for affected PostgreSQL versions and implement the necessary patches as soon as possible.
Vulnerability Details
The official description of CVE-2026-2004 outlines a missing validation of the type of input in the PostgreSQL intarray extension selectivity estimator function. This flaw allows an object creator to execute arbitrary code as the operating system user running the database. The vulnerability is classified under CWE-1287, indicating a flaw in the input validation process.
The CVSS version 3.1 score for this vulnerability is 8.8, classified as high severity. The attack vector is network-based, with low attack complexity and the requirement for low privileges. There is no user interaction required, and the potential impacts include high confidentiality, integrity, and availability risks.
The vulnerability affects all versions of PostgreSQL prior to the specified patched versions, which include 18.2, 17.8, 16.12, 15.16, and 14.21. Organizations running these versions should take immediate action to protect their systems.
Technical Analysis
The root cause of CVE-2026-2004 is the lack of input validation in the PostgreSQL intarray extension. This flaw allows attackers to manipulate the data being processed, potentially leading to arbitrary code execution on the server. The attack vector is through network communications, making it accessible to remote attackers.
The attack complexity is considered low, as no specialized skills or knowledge are necessary to exploit this vulnerability effectively. The privileges required are also low, meaning that even users with minimal access can potentially trigger the exploit. No user interaction is required, which increases the likelihood of successful exploitation.
The impact of this vulnerability is significant, with possible effects on confidentiality, integrity, and availability being classified as high. Organizations need to be aware of these risks and take appropriate measures to secure their PostgreSQL installations.
Risk & Impact Analysis
Real-world deployment of this vulnerability poses a considerable risk to organizations, particularly those utilizing PostgreSQL in critical applications. The ability for an attacker to execute arbitrary code on the database server opens avenues for data breaches, unauthorized access, and potential denial of service.
The urgency of addressing this vulnerability is underscored by its high CVSS score and the availability of exploits. Organizations should assess their databases for affected versions and prioritize patching to prevent potential exploitation.
The blast radius of this vulnerability may vary depending on the deployment. However, any organization using PostgreSQL without the necessary patches is at risk of severe consequences, making it imperative to take action swiftly.
Security teams should also consider conducting security audits and penetration testing to identify any additional vulnerabilities and ensure comprehensive protection of their systems.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The versions of PostgreSQL affected by this vulnerability include all versions prior to 18.2, 17.8, 16.12, 15.16, and 14.21. Organizations running these versions should take immediate corrective measures to secure their systems.
Mitigation & Remediation
To mitigate this vulnerability, it is essential to apply the latest patches provided by PostgreSQL. Organizations should upgrade to versions 18.2, 17.8, 16.12, 15.16, or 14.21 to ensure their systems are protected against potential exploits.
In cases where immediate patching is not feasible, organizations should consider implementing configuration hardening measures and network controls to restrict access to the PostgreSQL service. Regular monitoring of database logs for unusual activity can also help in early detection of potential exploitation attempts.
For further guidance on securing PostgreSQL installations, organizations can refer to resources on application security assessments.
Detection Guidance
Organizations should monitor their PostgreSQL logs for indicators of exploitation attempts, including unexpected input types being processed or unusual execution patterns. Behavioral anomalies and log anomalies may also signal potential attempts to exploit this vulnerability.
Network signatures should be established to alert on suspicious traffic patterns directed at PostgreSQL instances, particularly from untrusted sources.
AppSecure Threat Intelligence Insight
CVE-2026-2004 represents a significant vulnerability that highlights the importance of robust input validation mechanisms in database systems. This vulnerability and its exploitability underscore the need for security teams to prioritize secure coding practices during the development of database extensions.
As organizations continue to leverage PostgreSQL in various applications, understanding vulnerabilities like this one can help inform better security strategies. Regular security assessments, including penetration testing methodologies, are essential to uncovering potential weaknesses before they can be exploited.
Overall, CVE-2026-2004 serves as a reminder for security teams to remain vigilant and proactive in their defense against emerging threats in the database landscape.
To further enhance security posture, organizations may explore resources on vulnerability management programs and consider engaging in red teaming exercises to assess their security defenses.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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