# CVE-2026-78557: Cross-site scripting in Industrial Edge App Publisher

> An XSS vulnerability in Siemens Industrial Edge App Publisher allows attackers to execute arbitrary JavaScript, leading to remote code execution on the victim's machine.

- **Severity:** High 7.7 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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:** 13 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-xm4r-r2wp-vxpp

## What is CVE-2026-78557?

CVE-2026-78557 is a high-severity cross-site scripting vulnerability in Siemens Industrial Edge App Publisher, published on 13 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 has been identified in Industrial Edge App Publisher (All versions < V1.27.9). The application fails to properly sanitize or escape data received from the backend before rendering it in the user interface. Because the front end is integrated with Node.js, this vulnerability allows for the execution of arbitrary JavaScript, which can be leveraged to achieve remote code execution (RCE) on the victim's machine

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-78557?


## How do I fix CVE-2026-78557?

No fix has been published for CVE-2026-78557 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78557 being exploited?

There is no known exploitation of CVE-2026-78557 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78557 and fix it if it is affected.

What it is: CVE-2026-78557 is a high-severity cross-site scripting vulnerability in Siemens Industrial Edge App Publisher, published on 13 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: There is no known exploitation of CVE-2026-78557 in the wild and no public exploit code.

Affected product: Siemens Industrial Edge App Publisher. 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-2026-78557/ (Markdown: https://insights.sbomify.com/CVE-2026-78557/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78557
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78557
- OSV: https://osv.dev/vulnerability/CVE-2026-78557

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-78557/
Summaries are generated and may contain mistakes; the official description above is the record.