# CVE-2026-78490: Auth bypass in Secure Connect Gateway 5.0 - Appliance

> An unauthenticated remote attacker can bypass authentication restrictions due to improper handling of excessive attempts, leading to client-side request forgery.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2026
- **Updated:** 9 Sep 2026
- **Also known as:** GHSA-grgm-9w3p-6vh7

## What is CVE-2026-78490?

CVE-2026-78490 is a high-severity authentication bypass vulnerability in Dell Secure Connect Gateway, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00, contains an Improper Restriction of Excessive Authentication Attempts vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to client-side request forgery.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-78490?

It affects 1 product.


Products: Dell Secure Connect Gateway.

## How do I fix CVE-2026-78490?

No fix has been published for CVE-2026-78490 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78490 being exploited?

There is no known exploitation of CVE-2026-78490 in the wild and no public exploit code.

## Other vulnerabilities in Dell Secure Connect Gateway

- [CVE-2026-80172](https://insights.sbomify.com/CVE-2026-80172/): Auth bypass in Secure Connect Gateway 5.0 - Appliance (critical 9.8)
- [CVE-2026-61410](https://insights.sbomify.com/CVE-2026-61410/): Missing authorization in Secure Connect Gateway 5.0 - Appliance (critical 9.4)
- [CVE-2026-80238](https://insights.sbomify.com/CVE-2026-80238/): Privilege escalation in Secure Connect Gateway 5.0 - Appliance (critical 9.3)
- [CVE-2026-78491](https://insights.sbomify.com/CVE-2026-78491/): Security feature bypass in Secure Connect Gateway 5.0 - Appliance (high 8.2)
- [CVE-2026-79645](https://insights.sbomify.com/CVE-2026-79645/): Missing authorization in Secure Connect Gateway 5.0 - Appliance (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78490 and fix it if it is affected.

What it is: CVE-2026-78490 is a high-severity authentication bypass vulnerability in Dell Secure Connect Gateway, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-78490 in the wild and no public exploit code.

Affected product: Dell Secure Connect Gateway. 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-2026-78490/ (Markdown: https://insights.sbomify.com/CVE-2026-78490/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78490
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78490
- OSV: https://osv.dev/vulnerability/CVE-2026-78490

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78490/
Summaries are generated and may contain mistakes; the official description above is the record.