Vulnerability · Published May 29, 2026 · Assigned by GitHub_M
CVE-2026-45627Arcane: Unauthenticated reflected XSS via SVG color parameter in /api/app-images/logo enables admin account takeover
High 8.2
In plain English
A high-severity cross-site scripting in arcane from getarcaneapp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 <style> element of the embedded logo.svg, allowing an attacker to close the style block and inject executable <script> 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/getarcaneapp/arcane/backend | 1.19.0 | GHSA-q2pj-8v84-9mh5 |
| Go | github.com/getarcaneapp/arcane/backend | 1.19.0 | GO-2026-5561 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| getarcaneapp | arcane | < 1.19.0 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
References
- https://github.com/getarcaneapp/arcane/security/advisories/GHSA-q2pj-8v84-9mh5 x_refsource_CONFIRM