Buffer Overflow in Apache HTTP Server Affects Multiple Platforms

CVE-2026-63292

What is CVE-2026-63292?

CVE-2026-63292 is a vulnerability identified in the Apache HTTP Server's mod_vhost_alias module, which allows the server to dynamically map virtual hosts based on incoming HTTP requests. The issue arises from a stack-based buffer overflow caused by an excessively large Host header in HTTP requests. Specifically, if the Host header exceeds 8192 bytes and certain configurations involving VirtualDocumentRoot and LimitRequestFieldSize are altered, it can lead to unexpected behavior, such as a denial of service or even the potential execution of arbitrary code on affected systems.

This vulnerability poses a serious risk to organizations utilizing Apache HTTP Server, as it can allow attackers to disrupt service operations or, in more severe cases, gain unauthorized control of the server, leading to possible data breaches or system compromise. Given the widespread adoption of Apache HTTP Server across various platforms, the implications of this vulnerability can be extensive, affecting a multitude of users and infrastructures.

Potential impact of CVE-2026-63292

1. Denial of Service (DoS): Attackers can exploit this vulnerability to cause significant disruption to service availability, rendering the server unresponsive and impacting users' access to hosted resources.

2. Arbitrary Code Execution: The buffer overflow presents an opportunity for attackers to execute malicious code on the server, which could lead to unauthorized access, data manipulation, or further exploitation of the networked environment.

3. Operational Risk: Organizations may face increased operational challenges and potential legal repercussions due to breaches resulting from this vulnerability, especially if sensitive data is compromised or regulatory requirements are not met following an incident.

References