# CVE-2026-28263: Cross-site scripting in PowerProtect Data Domain

> A high-privileged remote attacker can inject scripts into Dell PowerProtect Data Domain, potentially executing code or bypassing security controls.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 17 Apr 2026
- **Updated:** 18 Apr 2026
- **Also known as:** GHSA-6w3g-2v88-h993

## What is CVE-2026-28263?

CVE-2026-28263 is a medium-severity cross-site scripting vulnerability in Dell Data Domain Operating System, published on 17 Apr 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 through 8.5, LTS2025 release version 8.3.1.0 through 8.3.1.20, LTS2024 release versions 7.13.1.0 through 7.13.1.50, contain a cross-site Scripting vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Script injection.

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

## Which versions are affected by CVE-2026-28263?

It affects 2 products.


Products: Dell Data Domain Operating System, Dell Powerprotect Data Domain.

## How do I fix CVE-2026-28263?

No fix has been published for CVE-2026-28263 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-28263 being exploited?

There is no known exploitation of CVE-2026-28263 in the wild and no public exploit code.

## Other vulnerabilities in Dell Data Domain Operating System

- [CVE-2026-53481](https://insights.sbomify.com/CVE-2026-53481/): Path traversal in PowerProtect Data Domain (critical 9.8)
- [CVE-2026-53483](https://insights.sbomify.com/CVE-2026-53483/): Auth bypass in PowerProtect Data Domain (critical 9.8)
- [CVE-2025-36594](https://insights.sbomify.com/CVE-2025-36594/): Auth bypass in PowerProtect Data Domain Feature Release (critical 9.8)
- [CVE-2026-56086](https://insights.sbomify.com/CVE-2026-56086/): Missing authorization in PowerProtect Data Domain (high 8.8)
- [CVE-2026-26944](https://insights.sbomify.com/CVE-2026-26944/): Missing authorization in PowerProtect Data Domain (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-28263 and fix it if it is affected.

What it is: CVE-2026-28263 is a medium-severity cross-site scripting vulnerability in Dell Data Domain Operating System, published on 17 Apr 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-28263 in the wild and no public exploit code.

Affected product: Dell Data Domain Operating System. 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-2026-28263/ (Markdown: https://insights.sbomify.com/CVE-2026-28263/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-28263
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28263
- OSV: https://osv.dev/vulnerability/CVE-2026-28263

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-28263/
Summaries are generated and may contain mistakes; the official description above is the record.