SEPTEMBER 13, 2026
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Case File

CVE-2026-90453

MEDIUM · CVSS 5.1 EPSS 0.22%

Source: NVD + CISA KEV + EPSS · Published 2026-09-11 · Last synced 2026-09-13

CyberRota Analysis

AI-Generated

A vulnerability exists in the file-upload handler that allows an authenticated attacker to exploit the Referer header, redirecting another user's browser to an arbitrary external URL post-upload without proper validation. This could lead to phishing attacks or other malicious activities targeting users of the affected application. Organizations utilizing this file-upload functionality should prioritize remediation to mitigate potential risks to their users.

CVE
CVE-2026-90453
Severity
MEDIUM
CVSS
5.1
EPSS
0.22%

Original NVD Description

A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.