# CVE-2026-87426: Information disclosure in Brocade Active Support Connectivity Gateway

> Unauthenticated attackers can query internal endpoints to disclose SAN fabric topology and switch connectivity details in Brocade ASCG.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2026
- **Updated:** 8 Oct 2026
- **Also known as:** GHSA-c348-g24g-jfxx

## What is CVE-2026-87426?

CVE-2026-87426 is a medium-severity vulnerability in Brocade Active Support Connectivity Gateway, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An unauthenticated network-based attacker can query specific internal management endpoints on Brocade ASCG versions before 3.5.0 to enumerate the configuration details and state of managed Brocade Fabric OS (FOS) switches. This results in the unauthorized disclosure of the customer's SAN fabric management topology and switch connectivity attributes.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-87426?

It affects 1 product.


Products: Broadcom Brocade Active Support Connectivity Gateway.

## How do I fix CVE-2026-87426?

No fix has been published for CVE-2026-87426 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-87426 being exploited?

There is no known exploitation of CVE-2026-87426 in the wild and no public exploit code.

## Other vulnerabilities in Brocade Active Support Connectivity Gateway

- [CVE-2026-85421](https://insights.sbomify.com/CVE-2026-85421/): Missing authorization in Brocade Active Support Connectivity Gateway (high 8.7)
- [CVE-2026-85489](https://insights.sbomify.com/CVE-2026-85489/): Missing authorization in Brocade Active Support Connectivity Gateway (high 8.7)
- [CVE-2026-85423](https://insights.sbomify.com/CVE-2026-85423/): A vulnerability has been identified in the data collection service of Brocade ASCG versions before 3.5.0. (high 8.6)
- [CVE-2026-85486](https://insights.sbomify.com/CVE-2026-85486/): Code injection in Brocade Active Support Connectivity Gateway (high 8.6)
- [CVE-2026-85487](https://insights.sbomify.com/CVE-2026-85487/): Path traversal in Brocade Active Support Connectivity Gateway (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-87426 and fix it if it is affected.

What it is: CVE-2026-87426 is a medium-severity vulnerability in Brocade Active Support Connectivity Gateway, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-87426 in the wild and no public exploit code.

Affected product: Brocade Active Support Connectivity 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-2026-87426/ (Markdown: https://insights.sbomify.com/CVE-2026-87426/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-87426
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-87426
- OSV: https://osv.dev/vulnerability/CVE-2026-87426

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-87426/
Summaries are generated and may contain mistakes; the official description above is the record.