# CVE-2026-66155: Cross-site scripting in Element maps-ng V47

> An attacker can execute arbitrary script code in a victim's browser by crafting a malicious URL that triggers XSS when hovering over map pins.

- **Severity:** High 7.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Aug 2026
- **Updated:** 27 Aug 2026

## What is CVE-2026-66155?

CVE-2026-66155 is a high-severity cross-site scripting vulnerability in Siemens Element maps-ng V47, published on 27 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in Element maps-ng V47 (All versions < V47.12.3), Element maps-ng V48 (All versions < V48.11.3), Element maps-ng V49 (All versions < V49.16.1). The si-map component does not properly neutralize user-controllable input of the points property that is used to render the tooltip label of map pins.
This could allow an attacker to craft a malicious URL that, when loaded by a victim and the map pin is hovered over, executes arbitrary script code within the victim's browser session.

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

## Which versions are affected by CVE-2026-66155?


## How do I fix CVE-2026-66155?

No fix has been published for CVE-2026-66155 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-66155 being exploited?

There is no known exploitation of CVE-2026-66155 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-66155 and fix it if it is affected.

What it is: CVE-2026-66155 is a high-severity cross-site scripting vulnerability in Siemens Element maps-ng V47, published on 27 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-66155 in the wild and no public exploit code.

Affected product: Siemens Element maps-ng V47. 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-2026-66155/ (Markdown: https://insights.sbomify.com/CVE-2026-66155/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-66155
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-66155
- OSV: https://osv.dev/vulnerability/CVE-2026-66155

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-66155/
Summaries are generated and may contain mistakes; the official description above is the record.