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CVE-2026-40242

Getarcane Arcane server-side request forgery (SSRF)

7.2 HIGHPublic exploitEPSS 0.72%
  1. Published10 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected products

Getarcane Arcane< 1.17.3

Remediation

Fixed in
Getarcane Arcane≥ 1.17.3

References

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Frequently asked

Is CVE-2026-40242 being actively exploited?

CVE-2026-40242 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.72%.

How severe is CVE-2026-40242?

CVE-2026-40242 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 0.72% probability of exploitation.

Which products are affected by CVE-2026-40242?

Affected products include Getarcane Arcane.

How do I fix CVE-2026-40242?

Upgrade affected software to a fixed version, for example Getarcane Arcane 1.17.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-40242 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.