CVE-2026-4405 IBM Concert Software Use of Web Browser Cache Containing Sensitive Information
Medium 4.0
Published
Updated
Check this codebase for CVE-2026-4405 and fix it if it is affected.
What it is: CVE-2026-4405 is a medium-severity vulnerability in IBM Concert, published on 19 Oct 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-2026-4405 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-2026-4405/ (Markdown: https://insights.sbomify.com/CVE-2026-4405/index.md)
Local users can read sensitive information from the web browser cache in IBM Concert, requiring a patch to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4405?
CVE-2026-4405 is a medium-severity vulnerability in IBM Concert, published on 19 Oct 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 through 3.0.0 allows web page cache to be stored locally which can be read by another user on the system.
Weakness: CWE-525
Which versions are affected by CVE-2026-4405?
How do I fix CVE-2026-4405?
No fix has been published for CVE-2026-4405 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4405 being exploited?
There is no known exploitation of CVE-2026-4405 in the wild and no public exploit code.
Sources
Also known as GHSA-gvx3-67jp-9j46.