CVE-2026-113383 Optimal IdM OptimalCloud Login cross site scripting
Medium 5.3
Published
Updated
Check this codebase for CVE-2026-113383 and fix it if it is affected.
What it is: CVE-2026-113383 is a medium-severity vulnerability in OptimalCloud, published on 20 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-113383 in the wild and no public exploit code.
Affected product: OptimalCloud. 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-2026-113383/ (Markdown: https://insights.sbomify.com/CVE-2026-113383/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-113383?
CVE-2026-113383 is a medium-severity vulnerability in OptimalCloud, published on 20 Oct 2026.
Official description
A vulnerability was detected in Optimal IdM OptimalCloud 5.0. This affects an unknown part of the file /v5.0/webapps/pages/public/Login. Performing a manipulation of the argument tz results in cross site scripting. Remote exploitation of the attack is possible. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-113383?
How do I fix CVE-2026-113383?
No fix has been published for CVE-2026-113383 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-113383 being exploited?
There is no known exploitation of CVE-2026-113383 in the wild and no public exploit code.
Sources
Also known as GHSA-w5c9-8gc4-7q4x.