SSRF in Getarcane Arcane
CVE-2026-40242
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.006 (47.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Getarcane Arcane
- Getarcaneapp Arcane — versions < 1.17.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-40242?
- CVE-2026-40242 is a high-severity vulnerability in Getarcane Arcane, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.2/10. Published 2026-04-10.
- How severe is CVE-2026-40242?
- High severity. CVSS v3 base score is 7.2 out of 10.