# CVE-2026-90486: openstatusHQ openstatus resolve-custom-domain-rewrite.ts server-side request forgery

> Remote attackers can exploit a server-side request forgery vulnerability in the custom domain rewrite logic to access internal resources.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/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:** 12 Sep 2026
- **Updated:** 15 Sep 2026
- **Also known as:** GHSA-8vvf-7v96-575p

## What is CVE-2026-90486?

CVE-2026-90486 is a medium-severity server-side request forgery vulnerability in openstatusHQ openstatus, published on 12 Sep 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 has been found in openstatusHQ openstatus up to f04c827112f30a11d571ebdad3892826034d6265. Affected by this vulnerability is an unknown functionality of the file apps/status-page/src/lib/proxy/resolve-custom-domain-rewrite.ts. The manipulation leads to server-side request forgery. The attack may be initiated remotely. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The identifier of the patch is 86f370c9c20074c3c3fdec53a359874b8e670fd4. It is suggested to install a patch to address this issue. This issue got fixed with a silent patch.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-90486?


## How do I fix CVE-2026-90486?

No fix has been published for CVE-2026-90486 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90486 being exploited?

There is no known exploitation of CVE-2026-90486 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90486 and fix it if it is affected.

What it is: CVE-2026-90486 is a medium-severity server-side request forgery vulnerability in openstatusHQ openstatus, published on 12 Sep 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-2026-90486 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-2026-90486/ (Markdown: https://insights.sbomify.com/CVE-2026-90486/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90486
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90486
- OSV: https://osv.dev/vulnerability/CVE-2026-90486

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90486/
Summaries are generated and may contain mistakes; the official description above is the record.