CVE-2026-40242
Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
5th
Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.17.3, the /api/templates/fetch endpoint accepts a caller-supplied url parameter and performs a server-side HTTP GET request to that URL without authentication and without URL scheme or host validation. The server's response is returned directly to the caller. type. This constitutes an unauthenticated SSRF vulnerability affecting any publicly reachable Arcane instance. This vulnerability is fixed in 1.17.3.
| CWE | CWE-918 |
| Vendor | getarcaneapp |
| Product | arcane |
| Published | Apr 10, 2026 |
| Last Updated | Apr 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
getarcaneapp / arcane
< 1.17.3