CVE-2026-101201 QBinaryJson::fromBinaryData() integer overflow leading to OOB read
Medium 4.3
Published
Updated
Check this codebase for CVE-2026-101201 and fix it if it is affected.
What it is: CVE-2026-101201 is a medium-severity vulnerability in qt, published on 20 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-101201 in the wild and no public exploit code.
Affected product: qt. 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-2026-101201/ (Markdown: https://insights.sbomify.com/CVE-2026-101201/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-101201?
CVE-2026-101201 is a medium-severity vulnerability in qt, published on 20 Oct 2026.
Official description
A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.
Which versions are affected by CVE-2026-101201?
How do I fix CVE-2026-101201?
Upgrade to a fixed version.
Is CVE-2026-101201 being exploited?
There is no known exploitation of CVE-2026-101201 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-101201, ECHO-92b8-8985-2213, GHSA-7cv7-2mxj-57c6, OESA-2026-4484, OESA-2026-4485, OESA-2026-4486 and 1 more.