# CVE-2026-79816: Unauthenticated DOM-Based Cross-Site Scripting (XSS) Vulnerability in the ClearPass Policy Manager Client Interface

> Unauthenticated attackers can execute arbitrary scripts in victims' browsers via DOM-based XSS in the ClearPass Policy Manager client interface.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **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:** 6 Oct 2026
- **Updated:** 7 Oct 2026
- **Also known as:** GHSA-hq55-2fgh-r8wc

## What is CVE-2026-79816?

CVE-2026-79816 is a medium-severity cross-site scripting vulnerability in Hewlett Packard Enterprise (HPE) ClearPass Policy Manager (CPPM), published on 6 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 in a client interface of HPE Networking ClearPass Policy Manager could allow an unauthenticated remote attacker to conduct a DOM-based cross-site scripting (XSS) attack against a user of the affected client interface. Successful exploitation could allow an attacker to execute arbitrary script code in a victim's browser context within the affected client interface.

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

## Which versions are affected by CVE-2026-79816?


## How do I fix CVE-2026-79816?

No fix has been published for CVE-2026-79816 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-79816 being exploited?

There is no known exploitation of CVE-2026-79816 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-79816 and fix it if it is affected.

What it is: CVE-2026-79816 is a medium-severity cross-site scripting vulnerability in Hewlett Packard Enterprise (HPE) ClearPass Policy Manager (CPPM), published on 6 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-2026-79816 in the wild and no public exploit code.

Affected product: Hewlett Packard Enterprise (HPE) ClearPass Policy Manager (CPPM). 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-2026-79816/ (Markdown: https://insights.sbomify.com/CVE-2026-79816/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-79816
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-79816
- OSV: https://osv.dev/vulnerability/CVE-2026-79816

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-79816/
Summaries are generated and may contain mistakes; the official description above is the record.