# CVE-2026-55110: Cross-site request forgery in Cloud Gateways

> Attackers can exploit CORS misconfiguration to perform unauthorized actions on UniFi OS devices by tricking authenticated users into visiting malicious pages.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **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:** 2 Jul 2026
- **Updated:** 2 Jul 2026
- **Also known as:** GHSA-fwmw-87x4-wjv5

## What is CVE-2026-55110?

CVE-2026-55110 is a high-severity vulnerability in Ubiquiti Inc Cloud Gateways, published on 2 Jul 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 malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.

Weakness: CWE-942 (Permissive Cross-domain Security Policy with Untrusted Domains)

## Which versions are affected by CVE-2026-55110?

It affects 30 products.


Products: Ui Enterprise Firewall Core Firmware, Ui Enterprise Fortress Gateway Firmware, Ui Enterprise Network Video Recorder Core Firmware, Ui Enterprise Network Video Recorder Firmware, Ui Unas 2 Firmware, Ui Unas 4 Firmware, Ui Unas Pro 4 Firmware, Ui Unas Pro 8 Firmware, Ui Unas Pro Firmware, Ui Unifi Cloud Gateway Fiber Firmware, Ui Unifi Cloud Gateway Industrial Firmware, Ui Unifi Cloud Gateway Max Firmware, Ui Unifi Cloud Gateway Ultra Firmware, Ui Unifi Cloud Key Plus Firmware, Ui Unifi Cloudkey Enterprise Firmware, Ui Unifi Cloudkey Firmware, Ui Unifi Dream Machine Beast Firmware, Ui Unifi Dream Machine Pro Firmware, Ui Unifi Dream Machine Pro Max Firmware, Ui Unifi Dream Machine Special Edition Firmware and 10 more.

## How do I fix CVE-2026-55110?

No fix has been published for CVE-2026-55110 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-55110 being exploited?

There is no known exploitation of CVE-2026-55110 in the wild and no public exploit code.

## Other vulnerabilities in Ubiquiti Inc Cloud Gateways

- [CVE-2026-54402](https://insights.sbomify.com/CVE-2026-54402/): Command injection in Cloud Gateways (critical 9.9)
- [CVE-2026-54404](https://insights.sbomify.com/CVE-2026-54404/): SQL injection in Cloud Gateways (high 8.8)
- [CVE-2026-54403](https://insights.sbomify.com/CVE-2026-54403/): Path traversal in Cloud Gateways (high 8.6)
- [CVE-2026-54401](https://insights.sbomify.com/CVE-2026-54401/): Server-side request forgery in Cloud Gateways (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55110 and fix it if it is affected.

What it is: CVE-2026-55110 is a high-severity vulnerability in Ubiquiti Inc Cloud Gateways, published on 2 Jul 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-2026-55110 in the wild and no public exploit code.

Affected product: Ubiquiti Inc Cloud Gateways. 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-2026-55110/ (Markdown: https://insights.sbomify.com/CVE-2026-55110/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55110
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55110
- OSV: https://osv.dev/vulnerability/CVE-2026-55110

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-55110/
Summaries are generated and may contain mistakes; the official description above is the record.