CVE-2026-40242

HIGH NUCLEI

Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint

Title source: cna

Description

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.

Nuclei Templates (1)

Arcane <= 1.17.2 - Server-Side Request Forgery

HIGHVERIFIEDby 0x_Akoko

Shodan: http.html:"arcane"

References (2)

[X_Refsource_Confirm] https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj

[X_Refsource_Misc] https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3

Scores

CVSS v3 7.2

EPSS 0.0152

EPSS Percentile 81.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Details

CWE

CWE-918

Status published

Products (3)

getarcane/arcane < 1.17.3

getarcaneapp/arcane 0 - 1.17.3Go

getarcaneapp/arcane < 1.17.3

Published Apr 10, 2026

Tracked Since Apr 11, 2026