# CVE-2026-108931: Netcore NR268 DHCP dhcp_dynamicip_show.cgi eval cross site scripting

> Remote attackers can inject malicious scripts via the Hostname argument in the DHCP handler, potentially executing code or bypassing security controls.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-8863-378g-v6qf

## What is CVE-2026-108931?

CVE-2026-108931 is a medium-severity cross-site scripting vulnerability in Netcore NR268, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability was found in Netcore NR268 1.7.121109. This affects the function eval of the file dhcp_dynamicip_show.cgi of the component DHCP Handler. The manipulation of the argument Hostname results in cross site scripting. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-108931?


## How do I fix CVE-2026-108931?

No fix has been published for CVE-2026-108931 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108931 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108931 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108931 and fix it if it is affected.

What it is: CVE-2026-108931 is a medium-severity cross-site scripting vulnerability in Netcore NR268, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108931 exists.

Affected product: Netcore NR268. 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-2026-108931/ (Markdown: https://insights.sbomify.com/CVE-2026-108931/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108931
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108931
- OSV: https://osv.dev/vulnerability/CVE-2026-108931

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108931/
Summaries are generated and may contain mistakes; the official description above is the record.