# CVE-2026-6544: Multiple Vulnerabilities in IBM Concert Software

> Attackers can access sensitive files due to uncontrolled recursive directory copying in IBM Concert, requiring a patch to mitigate data exposure risks.

- **Severity:** Medium 6.2 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Sep 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-73wh-979r-wrpg

## What is CVE-2026-6544?

CVE-2026-6544 is a medium-severity vulnerability in Ibm Concert, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

IBM Concert 1.0.0 through 3.0.0 allows recursive copying of directories without proper controls which can lead to unintentional inclusion of sensitive or unnecessary files and increased attack surface.

Weakness: CWE-552 (Files or Directories Accessible to External Parties)

## Which versions are affected by CVE-2026-6544?

It affects 1 product.


Products: Ibm Concert.

## How do I fix CVE-2026-6544?

No fix has been published for CVE-2026-6544 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6544 being exploited?

There is no known exploitation of CVE-2026-6544 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Concert

- [CVE-2026-6721](https://insights.sbomify.com/CVE-2026-6721/): Multiple Vulnerabilities in IBM Concert Software (critical 9.8)
- [CVE-2026-6730](https://insights.sbomify.com/CVE-2026-6730/): Multiple Vulnerabilities in IBM Concert Software (critical 9.8)
- [CVE-2026-6928](https://insights.sbomify.com/CVE-2026-6928/): Multiple Vulnerabilities in IBM Concert Software (critical 9.8)
- [CVE-2026-3627](https://insights.sbomify.com/CVE-2026-3627/): Multiple Vulnerabilities in IBM Concert Software (critical 9.1)
- [CVE-2025-33015](https://insights.sbomify.com/CVE-2025-33015/): Multiple Vulnerabilities in IBM Concert Software (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6544 and fix it if it is affected.

What it is: CVE-2026-6544 is a medium-severity vulnerability in Ibm Concert, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6544 in the wild and no public exploit code.

Affected product: Ibm Concert. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-6544/ (Markdown: https://insights.sbomify.com/CVE-2026-6544/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6544
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6544
- OSV: https://osv.dev/vulnerability/CVE-2026-6544

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6544/
Summaries are generated and may contain mistakes; the official description above is the record.