Authentication Vulnerability in pgAdmin 4 by pgAdmin Org

CVE-2026-86863

What is CVE-2026-86863?

CVE-2026-86863 is an authentication vulnerability found in pgAdmin 4, a popular web-based administration tool for managing PostgreSQL databases. The purpose of pgAdmin 4 is to facilitate database management through a user-friendly graphical interface, providing features like database browsing, query editing, and reporting. This vulnerability arises from the way pgAdmin 4 handles authentication through its web server. Specifically, it relies on identity information from HTTP headers supplied by clients, which can be manipulated. An attacker capable of sending requests to the pgAdmin server could exploit this flaw to authenticate as any user without providing valid credentials, including high-level administrative users. This weakens the security of the application significantly, exposing organizations to unauthorized access, potential data breaches, and manipulation of sensitive database information.

Potential impact of CVE-2026-86863

1. Unauthorized Access: The primary risk associated with this vulnerability is the ability for attackers to gain unauthorized access to the pgAdmin application. By manipulating HTTP header values, attackers could impersonate legitimate users, including administrators, potentially leading to malicious data manipulation or extraction.

2. Data Breach and Integrity Risks: Given that pgAdmin is used for managing databases, unauthorized access can result in data breaches, where sensitive information could be leaked, altered, or deleted. This not only affects the confidentiality of data but also raises concerns about data integrity and the reliability of database operations.

3. Increased Attack Surface for Further Exploitation: The vulnerability may serve as a gateway for wider network attacks. Once an attacker gains access through pgAdmin, they could exploit further vulnerabilities within the database or adjacent systems, leading to more extensive compromises that could endanger an organization’s entire IT infrastructure.

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