# CVE-2026-16426: IBM Concert server-side request forgery

Source: https://junglewise.ai/threats/cve-2026-16426-ibm-concert-1-0-0-through-3-0-0-is-vulnerable-to-server-side  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-22. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-16426 · Severity: medium · CVSS 6.5 · Published 2026-09-22

IBM Concert is business software that handles workflow and application integration. A server-side request forgery vulnerability allows authenticated users to send unauthorized network requests from the system, enabling attackers to enumerate internal networks, access restricted resources, or launch further attacks on connected systems.

Technologies: [IBM Concert](https://junglewise.ai/threats/technologies/concert). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-16426 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-16426 being exploited in the wild.

**How severe is CVE-2026-16426?** Medium severity, with a CVSS score of 6.5, published 22 September 2026.

**Which products and versions are affected?** IBM Concert 1.0.0 through 3.0.0.

**Is there a fix for CVE-2026-16426?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-16426 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-16426?** Check whether you run IBM Concert at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A server-side request forgery (SSRF) vulnerability in IBM Concert versions 1.0.0 through 3.0.0 allows authenticated attackers to craft requests that the system processes on their behalf. This permits network enumeration and can serve as a pivot point for lateral movement or access to internal services. The vulnerability requires prior authentication to exploit.

## Affected products

- IBM Concert 1.0.0 through 3.0.0

## Timeline

- 2026-09-22: disclosed

## References

- [https://www.ibm.com/support/pages/node/7288830](https://www.ibm.com/support/pages/node/7288830)

## Related threats

- [IBM Concert command injection vulnerability](https://junglewise.ai/threats/cve-2026-6715-ibm-concert-1-0-through-3-0-1-1-allows-an-attacker-can-supply)
- [IBM Concert arbitrary command execution in dependencies](https://junglewise.ai/threats/cve-2026-15266-ibm-concert-1-0-through-3-0-1-1-contains-components-that-allow)
- [IBM Concert weak cryptographic algorithms allow decryption](https://junglewise.ai/threats/cve-2026-6719-ibm-concert-1-0-through-3-0-0-uses-weaker-than-expected)
- [IBM Concert cross-site scripting in Web UI](https://junglewise.ai/threats/cve-2026-4413-ibm-concert-1-0-through-3-0-0-is-vulnerable-to-cross-site)
- [IBM Concert local web cache accessible to other users](https://junglewise.ai/threats/cve-2026-4405-ibm-concert-1-0-through-3-0-0-allows-web-page-cache-to-be-stored)