# CVE-2026-40230: Helpy 2.8.0 - Stored XSS in knowledgebase Doc body rendering

> An authenticated attacker can inject malicious scripts into knowledge base documents, potentially compromising other users' sessions.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **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:** 29 Apr 2026
- **Updated:** 29 Apr 2026
- **Also known as:** GHSA-cgp7-5x28-x8x9

## What is CVE-2026-40230?

CVE-2026-40230 is a medium-severity cross-site scripting vulnerability in helpyio helpy, published on 29 Apr 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Helpy contains a stored cross-site scripting vulnerability in the knowledge base Doc rendering logic. An authenticated attacker with admin or agent editor privileges can persist arbitrary HTML or JavaScript in the body field of a knowledge base Doc.This issue affects helpy: 2.8.0.

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

## Which versions are affected by CVE-2026-40230?

It affects 1 product.


Products: Helpy.io Helpy.

## How do I fix CVE-2026-40230?

No fix has been published for CVE-2026-40230 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-40230 being exploited?

There is no known exploitation of CVE-2026-40230 in the wild and no public exploit code.

## Other vulnerabilities in helpyio helpy

- [CVE-2018-20851](https://insights.sbomify.com/CVE-2018-20851/): Missing authorization in n/a (high 8.8)
- [CVE-2025-52184](https://insights.sbomify.com/CVE-2025-52184/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2023-0357](https://insights.sbomify.com/CVE-2023-0357/): Cross-site scripting in Helpy (medium 6.1)
- [CVE-2018-18886](https://insights.sbomify.com/CVE-2018-18886/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2026-40229](https://insights.sbomify.com/CVE-2026-40229/): Helpy 2.8.0 - Stored XSS in post author display via PostsHelper (medium 5.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40230 and fix it if it is affected.

What it is: CVE-2026-40230 is a medium-severity cross-site scripting vulnerability in helpyio helpy, published on 29 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-2026-40230 in the wild and no public exploit code.

Affected product: helpyio helpy. 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-2026-40230/ (Markdown: https://insights.sbomify.com/CVE-2026-40230/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40230
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40230
- OSV: https://osv.dev/vulnerability/CVE-2026-40230

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40230/
Summaries are generated and may contain mistakes; the official description above is the record.