CVE-2026-16037 Callback Authentication Bypass via Timing Attack in PayTR's PayTR Virtual Pos iFrame API WHMCS Module
High 7.5
Published
Updated
Check this codebase for CVE-2026-16037 and fix it if it is affected.
What it is: CVE-2026-16037 is a high-severity vulnerability in PayTR Virtual Pos iFrame API WHMCS Module, published on 8 Sep 2026.
Exploitation: There is no known exploitation of CVE-2026-16037 in the wild and no public exploit code.
Affected product: PayTR Virtual Pos iFrame API WHMCS Module. 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-2026-16037/ (Markdown: https://insights.sbomify.com/CVE-2026-16037/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-16037?
CVE-2026-16037 is a high-severity vulnerability in PayTR Virtual Pos iFrame API WHMCS Module, published on 8 Sep 2026.
Official description
Observable timing discrepancy vulnerability in PayTR Payment and Electronic Money Institution Inc. PayTR Virtual Pos iFrame API WHMCS Module allows Black Box Reverse Engineering.
This issue affects PayTR Virtual Pos iFrame API WHMCS Module: from v9.0.0 before v9.0.3.
Weakness: CWE-208
Which versions are affected by CVE-2026-16037?
How do I fix CVE-2026-16037?
No fix has been published for CVE-2026-16037 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-16037 being exploited?
There is no known exploitation of CVE-2026-16037 in the wild and no public exploit code.
Sources
Also known as GHSA-v26j-p538-j93h.