CVE-2026-101158
Received
Received - Intake
Stored XSS in Arista CloudVision Portal
Vulnerability report for CVE-2026-101158, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-06
Last updated on: 2026-10-06
Assigner: Arista Networks, Inc.
Description
Description
A missing input validation vulnerability in the Fileserver upload API allows an authenticated attacker with file upload privileges to execute stored cross-site scripting (XSS). Successful exploitation could enable the attacker to hijack another CloudVision user's web session, potentially granting full access to their account and administrative permissions.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Arista | Networks | CloudVision Portal 2026.2.0 |
| Arista | Networks | CloudVision Portal 2026.1.0 |
| Arista | Networks | CloudVision Portal 2025.3.0 |
| Arista | Networks | CloudVision Portal 1.0.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
