Vulnerability Intelligence Report
Security Advisory 0185
CVE-2026-101158
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.
Cross-Site Scripting (XSS)
No Active Exploit Signals
CVSS Base Score
8.4
HIGH
Exploitability:1.7
Impact Score:6.1
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-79 ↗CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Arista Networks | CloudVision Portal | 2026.2.0 (affected), 2026.1.0 <= 2026.1.2 (affected), 2025.3.0 <= 2025.3.3 (affected), 1.0.0 < 2025.3.0 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Vulnerability Class
Cross-Site Scripting (XSS)
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Arista Networks, Inc. · Vendor · USA |
| Reserved | 2026-09-28T08:30:31 |
| Published | 2026-10-06T19:36:51 |
| Last Updated | 2026-10-06T19:51:46 |
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