Risk Letters

Exploited vulnerability

CVE-2026-40242

TLP:CLEAR

getarcane arcane Server-Side Request Forgery (SSRF)

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.

Facts

  • Vendor: getarcane
  • Product: arcane
  • EPSS (probability of exploitation within 30 days): 0.6 %
  • First known exploitation: 17 September 2026
  • First seen by Risk Letters: 17 September 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD