CVE-2026-45627: Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.19.0, the unauthenticated GET /api/app-images/logo endpoint…

PriorityP342high8.2CVSS 3.1

AVNACLPRNUIRSCCHILAN

EPSS

0.18%

8.2th percentile

Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.19.0, the unauthenticated GET /api/app-images/logo endpoint reflects a user-supplied color query parameter into the body of an SVG document via strings.ReplaceAll with no escaping. The substitution lands inside a element of the embedded logo.svg, allowing an attacker to close the style block and inject executable content. Because the response is served as image/svg+xml and Arcane sets no Content-Security-Policy or X-Content-Type-Options headers, navigating a logged-in admin victim to a crafted URL executes attacker-controlled JavaScript in Arcane's origin and rides the victim's HttpOnly JWT cookie to fully compromise the admin account. This vulnerability is fixed in 1.19.0.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
getarcaneapp	arcane	< 1.19.0	1.19.0
github.com	getarcaneapp_arcane_backend	>= 0 < 1.19.0	1.19.0

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