CVE-2026-40242
Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint
Vexday Risk Score
36Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 7.2EPSS 0.6%KEV nãoPoC —Nuclei simMetasploit —Patch —
Lifecycle
10 Apr 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Affected products
getarcaneapp · arcaneWant to know if your infrastructure is exposed to this?
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