CVE-2026-90453

published 2026-09-11

CVE-2026-90453: 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…

Priority P4 34 medium 5.1 CVSS 4.0

AV N AC L AT N PR L UI P VC N VI L VA N SC N SI N SA N E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU X R X V X RE X U X

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.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
cisa	malcolm	< v26.06.0	v26.06.0

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-601