# CVE-2026-5808: openstatusHQ openstatus Onboarding Endpoint client.tsx cross site scripting

> Attackers can inject malicious scripts via the callbackURL parameter in the onboarding endpoint, potentially compromising user sessions.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X`)
- **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:** 8 Apr 2026
- **Updated:** 9 Apr 2026
- **Also known as:** GHSA-952x-346h-wrvr

## What is CVE-2026-5808?

CVE-2026-5808 is a medium-severity cross-site scripting vulnerability in openstatusHQ openstatus, published on 8 Apr 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 was detected in openstatusHQ openstatus up to 1b678e71a85961ae319cbb214a8eae634059330c. This impacts an unknown function of the file apps/dashboard/src/app/(dashboard)/onboarding/client.tsx of the component Onboarding Endpoint. The manipulation of the argument callbackURL results in cross site scripting. The attack may be launched remotely. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. The patch is identified as 43d9b2b9ef8ae1a98f9bdc8a9f86d6a3dfaa2dfb. It is advisable to implement a patch to correct this issue. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-5808?


## How do I fix CVE-2026-5808?

No fix has been published for CVE-2026-5808 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5808 being exploited?

There is no known exploitation of CVE-2026-5808 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5808 and fix it if it is affected.

What it is: CVE-2026-5808 is a medium-severity cross-site scripting vulnerability in openstatusHQ openstatus, published on 8 Apr 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-2026-5808 in the wild and no public exploit code.

Affected product: openstatusHQ openstatus. 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-2026-5808/ (Markdown: https://insights.sbomify.com/CVE-2026-5808/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5808
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5808
- OSV: https://osv.dev/vulnerability/CVE-2026-5808

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5808/
Summaries are generated and may contain mistakes; the official description above is the record.