CVE-2026-17465 in Concert
Summary
by MITRE • 09/23/2026
IBM Concert 1.0.0 through 3.0.0 could allow a remote authenticated attacker to cause a denial of service due to improper enforcement of storage limits.
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Analysis
by VulDB Data Team • 09/23/2026
The vulnerability identified in IBM Concert versions 1.0.0 through 3.0.0 represents a significant security flaw rooted in the application's failure to properly enforce storage quotas and resource constraints. This issue falls under the category of Improper Limitation of a Resource by Its Consumer, commonly referenced as CWE-400 in industry standard classification systems. The core technical deficiency lies within the backend logic that handles data ingestion or file uploads from authenticated users. Instead of implementing strict boundaries on the volume of data accepted per session or per user account, the application allows requests to consume memory and disk space without adequate throttling or validation checks against predefined limits. This lack of enforcement means that a malicious actor who has successfully obtained valid credentials can exploit this gap by submitting excessively large payloads or initiating rapid sequences of high-volume operations.
From an operational perspective, the primary impact of this vulnerability is a denial of service condition affecting both the specific target user and potentially the broader infrastructure hosting IBM Concert. By exhausting available system resources such as RAM, CPU cycles associated with processing oversized inputs, or disk storage capacity, the attacker can render the application unresponsive to legitimate users. This type of attack does not require privilege escalation beyond what is already granted by the authenticated session, making it particularly dangerous in environments where user accounts are easily compromised through phishing or credential stuffing attacks. The resulting service disruption can lead to significant business continuity issues, data processing delays, and increased operational costs due to manual intervention required to restore system stability.
The attack vector for this vulnerability aligns with techniques observed in the MITRE ATT&CK framework, specifically relating to resource exhaustion via application layer abuse. While it is not a direct exploitation of memory corruption like buffer overflows, it leverages the same principle of overwhelming system capacity through legitimate but maliciously scaled interactions. The requirement for authentication means that this vulnerability cannot be exploited by anonymous external attackers on the internet without first compromising user credentials. However, in internal networks or environments with weak identity management practices, the barrier to entry is low enough to pose a substantial risk. Attackers may automate the process using scripts to send continuous large requests until the service crashes or becomes sluggish, effectively achieving a denial of service state that disrupts business operations.
Mitigation strategies for this vulnerability must focus on both immediate remediation and long-term architectural improvements. The most effective solution is to upgrade IBM Concert to version 3.0.1 or later, where the vendor has addressed these storage limit enforcement issues by implementing robust input validation and resource quota management mechanisms. For organizations unable to patch immediately due to compatibility constraints, compensating controls should be deployed at the network perimeter using web application firewalls that can detect and block unusually large request bodies or high-frequency upload patterns from single sources. Additionally, administrators should configure server-side limits on maximum file sizes and session data storage to ensure that even if an attacker bypasses application-level checks, infrastructure-level safeguards prevent total resource exhaustion. Regular auditing of user activity logs for anomalous spikes in data consumption can also aid in early detection and response to such abuse attempts.