# CVE-2026-13326: Out-of-bounds read and integer underflow vulnerability in QNdefNfcTextRecord impacts Qt NFC module

> A physically proximate attacker can cause denial of service or limited memory disclosure in the Qt NFC module via a crafted NFC tag.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 11 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** AZL-101111, DEBIAN-CVE-2026-13326, GHSA-83vf-f8f4-pj48, OESA-2026-3918, OESA-2026-3919, OESA-2026-4005

## What is CVE-2026-13326?

CVE-2026-13326 is a medium-severity vulnerability in qt, published on 11 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

An out-of-bounds read in Qt NFC's language code length parsing allows a physically proximate attacker to cause a denial of service or limited memory disclosure via a crafted NFC tag.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound)), CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-13326?


## How do I fix CVE-2026-13326?

Apply the vendor's patch.

## Is CVE-2026-13326 being exploited?

There is no known exploitation of CVE-2026-13326 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-13326 and fix it if it is affected.

What it is: CVE-2026-13326 is a medium-severity vulnerability in qt, published on 11 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-13326 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-2026-13326/ (Markdown: https://insights.sbomify.com/CVE-2026-13326/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13326
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13326
- OSV: https://osv.dev/vulnerability/CVE-2026-13326

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-13326/
Summaries are generated and may contain mistakes; the official description above is the record.