# CVE-2026-6928: IBM Concert use-after-free memory corruption

Source: https://junglewise.ai/threats/cve-2026-6928-ibm-concert-1-0-0-through-3-0-0-references-or-accesses-memory  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-6928 · Severity: critical · CVSS 9.8 · Published 2026-09-23

IBM Concert, a software platform used for enterprise integration, contains a use-after-free vulnerability that allows attackers to corrupt memory, crash the application, or execute arbitrary code. An attacker who can influence program execution or input to versions 1.0.0 through 3.0.0 can exploit this flaw to gain complete control of the affected system.

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

## Quick answers

**Is CVE-2026-6928 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-6928 being exploited in the wild.

**How severe is CVE-2026-6928?** Critical severity, with a CVSS score of 9.8, published 23 September 2026.

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

**Is there a fix for CVE-2026-6928?** 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-2026-6928 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-6928?** 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

The vulnerability is a use-after-free memory corruption issue in IBM Concert versions 1.0.0 through 3.0.0, exploitable by attackers who can influence program execution or input. Successful exploitation allows memory corruption, application denial of service, or arbitrary code execution with the privileges of the affected process.

## Affected products

- IBM Concert 1.0.0 through 3.0.0

## Timeline

- 2026-09-23: 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)