IBM Concert Regex Denial of Service Vulnerability

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: IBM Corporation

Description

IBM Concert 1.0.0 through 3.0.0 could allow a remote attacker to cause a denial of service using a specially crafted regular expression that would cause excessive resource consumption.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-22

Last Modified

2026-09-22

Generated

2026-09-23

AI Q&A

2026-09-23

EPSS Evaluated

N/A

NVD

CVE-2025-12767

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	concert	From 1.0.0 (inc) to 3.0.0 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

IBM Concert versions 1.0.0 through 3.0.0 are vulnerable to a denial of service attack. A remote attacker could exploit this by sending a specially crafted regular expression that causes excessive resource consumption on the affected system.

Impact Analysis

This vulnerability could lead to system slowdowns or complete unavailability of IBM Concert services due to resource exhaustion. It may disrupt normal operations and require system restarts to recover.

Mitigation Strategies

Update IBM Concert to the latest version beyond 3.0.0 to address the excessive resource consumption issue. Monitor network traffic for unusual patterns that may indicate a denial of service attempt.

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