# CVE-2026-102728: Memory corruption in NetX Duo

> A malicious server can trigger out-of-bounds reads in NetX Duo TLS/DTLS clients, potentially causing denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-4q67-8385-j6m5, GHSA-rqmh-m9w6-hv3m

## What is CVE-2026-102728?

CVE-2026-102728 is a high-severity memory corruption vulnerability in Eclipse Foundation NetX Duo, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Two client-side TLS/DTLS handshake parsers in NetX Secure read fields from a server-supplied message before validating that the message is long enough to contain them. Both are bounded out-of-bounds reads on a remotely reachable path, both are reached from a TLS or DTLS client connecting to a malicious or malformed server, and both have the same shape: the bounds check exists and returns the correct status, but it runs after the read it is meant to guard.

Weakness: CWE-126 (Buffer Over-read)

## Which versions are affected by CVE-2026-102728?


## How do I fix CVE-2026-102728?

No fix has been published for CVE-2026-102728 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-102728 being exploited?

There is no known exploitation of CVE-2026-102728 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-102728 and fix it if it is affected.

What it is: CVE-2026-102728 is a high-severity memory corruption vulnerability in Eclipse Foundation NetX Duo, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-102728 in the wild and no public exploit code.

Affected product: Eclipse Foundation NetX Duo. 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-2026-102728/ (Markdown: https://insights.sbomify.com/CVE-2026-102728/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-102728
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-102728
- OSV: https://osv.dev/vulnerability/CVE-2026-102728

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-102728/
Summaries are generated and may contain mistakes; the official description above is the record.