CVE-2026-42005 in Authoritative
Summary
by MITRE • 06/25/2026
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 06/25/2026
This vulnerability represents a classic denial of service condition that can be exploited through crafted web requests targeting an internal web server component. The flaw manifests as unlimited memory allocation during request processing, which occurs when the server fails to properly validate or limit memory consumption in response to attacker-controlled inputs. This type of vulnerability typically stems from inadequate input sanitization and memory management controls within the web server's request handling logic. The internal web server remains disabled by default, which significantly reduces the attack surface but does not eliminate the risk entirely since activation can occur through various administrative or configuration mechanisms.
The technical implementation of this vulnerability involves the web server's inability to enforce memory consumption limits during request processing, allowing an attacker to craft requests that trigger continuous or exponential memory allocation patterns. This behavior often occurs when the server processes malformed or specially crafted data without proper bounds checking or resource limitation mechanisms. The flaw can be categorized under common weakness enumeration CWE-770, which describes allocation of resources without limits or appropriate checks, and aligns with ATT&CK technique T1499.100 for resource exhaustion attacks. Memory allocation issues of this nature frequently arise from improper handling of user-supplied data in parsing or processing routines, where recursive operations or unbounded loops may be triggered by malicious input patterns.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise system stability and availability of legitimate services. When exploited successfully, the unlimited memory allocation can cause the internal web server to consume all available system resources, leading to system crashes, application hangs, or complete service unavailability. This type of denial of service attack can be particularly dangerous in environments where the internal web server serves critical functions or acts as a gateway for other services. The default disabled state provides some protection but does not eliminate risk since activation can occur through configuration changes, software updates, or administrative actions that may inadvertently enable the vulnerable component.
Mitigation strategies should focus on implementing comprehensive input validation and resource limitation controls within the web server's request handling pipeline. Organizations should deploy proper memory allocation limits and monitoring mechanisms to detect abnormal resource consumption patterns. The implementation of rate limiting, request size restrictions, and automated resource usage alerts can significantly reduce exploitation risk. Security measures should also include regular configuration reviews to ensure that internal web servers remain disabled unless absolutely necessary for business operations. Additionally, implementing network segmentation and access controls can limit potential attack vectors while maintaining proper security monitoring capabilities to detect anomalous behavior patterns that may indicate exploitation attempts.