CVE-2026-107590 Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt
Low 1.9
Published
Updated
Check this codebase for CVE-2026-107590 and fix it if it is affected.
What it is: CVE-2026-107590 is a low-severity vulnerability in Qt, published on 27 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-107590 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-2026-107590/ (Markdown: https://insights.sbomify.com/CVE-2026-107590/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-107590?
CVE-2026-107590 is a low-severity vulnerability in Qt, published on 27 Oct 2026.
Official description
An out-of-bounds write vulnerability in the Qt QTextCodec iconv-based encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Under certain conditions, encoding text with QTextCodec may write outside an internal buffer. This can cause the application to crash and may affect data integrity.
Which versions are affected by CVE-2026-107590?
How do I fix CVE-2026-107590?
No fix has been published for CVE-2026-107590 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-107590 being exploited?
There is no known exploitation of CVE-2026-107590 in the wild and no public exploit code.
Sources
Also known as GHSA-6m7p-vvj6-5527.