CVE-2026-87679: CWE-122: Heap-based Buffer Overflow in Brocade Fabric OS
Description
CVE-2026-87679 is a heap-based buffer overflow vulnerability in Brocade Fabric OS versions before 10.0.1. It occurs when processing trunk configuration operations via the REST API, where user-supplied list strings are parsed into heap arrays without proper boundary checks. An authenticated administrator can exploit this by sending crafted requests with excessive list delimiters, potentially causing heap corruption that may lead to service crashes or arbitrary code execution.
CVSS v4.0
Score 8.5high
Affected software
Brocade
Fabric OS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Brocade Fabric OS affects versions prior to 10.0.1. The flaw arises from improper boundary checking when parsing user-supplied list strings into dynamically allocated heap arrays during trunk configuration operations. An authenticated administrator can exploit this by crafting REST API requests containing an excessive number of list delimiters, triggering heap corruption. The impact includes potential service crashes or arbitrary code execution. The CVSS 4.0 base score is 8.5, indicating a high severity vulnerability. No known exploits in the wild have been reported, and no patch links are provided in the input data.
Potential Impact
Successful exploitation can lead to heap corruption, resulting in denial of service via service crashes or potentially arbitrary code execution with high privileges. This could compromise the affected system's integrity and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the REST API to trusted administrators only and monitor for unusual activity related to trunk configuration operations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- brocade
- Date Reserved
- 2026-09-08T22:51:12.186Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac6ef842cdf04f656b74226
Added to database: 10/08/2026, 01:19:00 UTC
Last enriched: 10/08/2026, 01:33:23 UTC
Last updated: 10/08/2026, 01:33:23 UTC
Views: 6
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