CVE-2026-3627: IBM Concert SQL Injection Vulnerability

CVE-2026-3627 Overview

IBM Concert versions 1.0.0 through 2.3.1 contain a SQL injection vulnerability tracked as CVE-2026-3627. A remote, unauthenticated attacker can send specially crafted SQL statements to the application. Successful exploitation allows the attacker to view, add, modify, or delete information in the back-end database.

The flaw is classified under [CWE-89] Improper Neutralization of Special Elements used in an SQL Command. The attack requires no privileges and no user interaction, and it can be executed over the network against exposed IBM Concert instances.

Critical Impact
Unauthenticated remote attackers can read, modify, or delete arbitrary records in the IBM Concert back-end database, leading to loss of confidentiality and integrity of application data.

Affected Products

IBM Concert 1.0.0 through 2.3.1
Deployments running on Linux kernel platforms
All configurations exposing the vulnerable database interaction paths

Discovery Timeline

2026-08-28 - CVE-2026-3627 published to NVD
2026-09-02 - Last updated in NVD database

Technical Details for CVE-2026-3627

Vulnerability Analysis

CVE-2026-3627 is a SQL injection vulnerability in IBM Concert. IBM Concert accepts attacker-supplied input and concatenates or interpolates it into SQL statements without proper neutralization. An attacker can break out of the intended query context and append arbitrary SQL clauses.

Because the vulnerability is reachable over the network without authentication, exploitation does not require a foothold or valid credentials. The scope of impact covers confidentiality and integrity of the underlying database, including the ability to add, modify, or delete records.

The EPSS probability for this CVE is 0.512% as of the September 2026 scoring date. This value indicates a low near-term likelihood of observed exploitation, but the trivial exploitation profile of SQL injection warrants prompt remediation.

Root Cause

The root cause is improper neutralization of special elements used in SQL commands, mapped to [CWE-89]. IBM Concert constructs one or more SQL queries using user-controlled input without parameterized queries or strict input validation. Special characters such as single quotes, semicolons, and SQL keywords are passed through to the query engine.

Attack Vector

An attacker sends HTTP requests containing crafted SQL payloads to a vulnerable IBM Concert endpoint. The payload alters the intended query logic, enabling data extraction with UNION-based or boolean-based techniques, and enabling modification or deletion through injected INSERT, UPDATE, or DELETE statements.

Refer to the IBM Support advisory for vendor guidance on affected endpoints and fix availability. No public proof-of-concept exploit is listed for this CVE at the time of publication.

Detection Methods for CVE-2026-3627

Indicators of Compromise

HTTP requests to IBM Concert endpoints containing SQL metacharacters such as ', --, ;, UNION SELECT, or OR 1=1
Unexpected database errors or stack traces in IBM Concert application logs correlated with external client IPs
Anomalous read volumes, row-count spikes, or unexplained INSERT, UPDATE, or DELETE operations in the Concert database audit log
Outbound connections from the Concert host to attacker-controlled infrastructure following suspicious request patterns

Detection Strategies

Deploy web application firewall (WAF) signatures for common SQL injection payloads targeting IBM Concert URL paths and JSON parameters
Enable database query logging and alert on syntactically malformed queries or queries containing unexpected tautologies
Correlate application access logs with database transaction logs to identify request-to-query pairs originating from a single untrusted source

Monitoring Recommendations

Monitor IBM Concert application logs for repeated HTTP 500 responses and database driver exceptions
Track authentication-independent access to Concert APIs from external network zones
Baseline normal query patterns for the Concert service account and alert on deviations in table access or query verbs

How to Mitigate CVE-2026-3627

Immediate Actions Required

Apply the fixed version of IBM Concert as directed by the IBM Support advisory
Restrict network access to the IBM Concert management and API interfaces to trusted networks and administrative bastions
Audit the Concert database for unauthorized records, modified rows, or unexpected privilege changes since the vulnerable versions were deployed
Rotate credentials, API keys, and secrets that may have been stored in or accessible from the Concert database

Patch Information

IBM has published remediation guidance on the IBM Support page for CVE-2026-3627. Administrators should upgrade IBM Concert to a version later than 2.3.1 as specified by IBM. Verify the fixed build number against the vendor advisory before deployment.

Workarounds

Place IBM Concert behind a WAF with SQL injection rulesets tuned for the Concert URI schema until patching is complete
Enforce least-privilege on the database account used by Concert, removing DROP, ALTER, and unnecessary DELETE rights where feasible
Disable or firewall any Concert API endpoints that are not required for business operations

bash

# Example iptables rule restricting IBM Concert access to a trusted management subnet
iptables -A INPUT -p tcp --dport 443 -s 10.0.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP