CVE-2026-87678: An input validation and output encoding vulnerability exists in the web management interface of Brocade Fabric

Q: How do I fix CVE-2026-87678?

fabric operating system: upgrade to 10.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-87678 being exploited?

CVE-2026-87678 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-87678 affect?

CVE-2026-87678 affects fabric operating system. Severity is medium (CVSS 5.2). An input validation and output encoding vulnerability exists in the web management interface of Brocade Fabric OS versions before 10.0.1. When configuring Federated Authentication (FA), the system fails to sanitize the Identity Provider (Id

Q: How urgent is CVE-2026-87678?

Priority 21/100. No elevated risk signals yet.

Routine

MEDIUM 5.2UPGRADE

CVE-2026-87678 is a medium-severity flaw (CVSS 5.2) affecting fabric operating system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An input validation and output encoding vulnerability exists in the web management interface of Brocade Fabric OS versions before 10.0.1. When configuring Federated Authentication (FA), the system fails to sanitize the Identity Provider (IdP) issuer parameter. An authenticated administrator—or an attacker capable of supplying crafted FA configuration files during an import routine—can inject arbitrary web server directives. This can lead to servi

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.2 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-93
Published	2026-10-08
Last modified	2026-10-14

Publisher (CNA): Brocade Communications Systems, LLC · Vendor: broadcom

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-08 03:16 UTCPublished CVE record published
2026-10-14 14:47 UTCUpdated Record last modified

broadcom fabric operating system UPGRADE

Affected: < 10.0.1

Fixed in: 10.0.1

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-87678?

fabric operating system: upgrade to 10.0.1. Exact commands for each OS are on this page.

Is CVE-2026-87678 being exploited?

CVE-2026-87678 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-87678 affect?

CVE-2026-87678 affects fabric operating system. Severity is medium (CVSS 5.2). An input validation and output encoding vulnerability exists in the web management interface of Brocade Fabric OS versions before 10.0.1. When configuring Federated Authentication (FA), the system fails to sanitize the Identity Provider (Id

How urgent is CVE-2026-87678?

Priority 21/100. No elevated risk signals yet.

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References

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