How severe is CVE-2026-40242?

CVE-2026-40242 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-40242 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40242?

CVE-2026-40242 affects Getarcane Arcane. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40242?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40242 have an EU (EUVD) identifier?

Yes. CVE-2026-40242 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21599.

When was CVE-2026-40242 published?

CVE-2026-40242 was published on 2026-04-10 and last updated on 2026-06-17.

CVE-2026-40242

CVE-2026-40242 is a high-severity vulnerability in Getarcane Arcane with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21599
Weakness: CWE-918
Affected product: Getarcane Arcane
Published: 2026-04-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-40242?: CVE-2026-40242 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-40242 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40242?: CVE-2026-40242 affects Getarcane Arcane. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40242?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40242 have an EU (EUVD) identifier?: Yes. CVE-2026-40242 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21599.
When was CVE-2026-40242 published?: CVE-2026-40242 was published on 2026-04-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:getarcane:arcane:*:*:*:*:*:*:*:*

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