What’s Vulnerable › Vulnerabilities

CVE-2026-40242: Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-10 · updated 2026-10-26
• Weakness: CWE-918

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.

Affected products

• Getarcane Arcane: before 1.17.3 — fixed in 1.17.3

How to fix

Upgrade to a fixed version: Getarcane Arcane 1.17.3. Check the vendor advisory for mitigations.

References

• https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3
• https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj
• https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj

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