CVE-2026-40242: CWE-918: Server-Side Request Forgery (SSRF) in getarcaneapp arcane
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.
AI Analysis
Technical Summary
The vulnerability in Arcane (before version 1.17.3) is an SSRF in the /api/templates/fetch endpoint. It accepts a URL parameter from the caller and performs an unauthenticated HTTP GET request to that URL without validating the URL scheme or host. The server returns the response directly to the caller, enabling attackers to induce the server to make arbitrary HTTP requests. This can be exploited on any publicly reachable Arcane instance. The vulnerability is tracked as CVE-2026-40242 and is classified under CWE-918. The CVSS 3.1 base score is 7.2, indicating a high severity vulnerability. The vulnerability is fixed in Arcane version 1.17.3.
Potential Impact
An unauthenticated attacker can exploit this SSRF vulnerability to make the Arcane server perform arbitrary HTTP GET requests to internal or external systems. This can lead to information disclosure (confidentiality impact) and integrity impact by potentially interacting with internal services. There is no direct availability impact reported. The vulnerability affects any publicly accessible Arcane instance running a version prior to 1.17.3.
Mitigation Recommendations
Upgrade Arcane to version 1.17.3 or later, where this SSRF vulnerability is fixed. Since the vulnerability is fixed in this version, applying this official update fully mitigates the risk. No additional mitigations are indicated by the vendor advisory.
CVE-2026-40242: CWE-918: Server-Side Request Forgery (SSRF) in getarcaneapp arcane
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Arcane (before version 1.17.3) is an SSRF in the /api/templates/fetch endpoint. It accepts a URL parameter from the caller and performs an unauthenticated HTTP GET request to that URL without validating the URL scheme or host. The server returns the response directly to the caller, enabling attackers to induce the server to make arbitrary HTTP requests. This can be exploited on any publicly reachable Arcane instance. The vulnerability is tracked as CVE-2026-40242 and is classified under CWE-918. The CVSS 3.1 base score is 7.2, indicating a high severity vulnerability. The vulnerability is fixed in Arcane version 1.17.3.
Potential Impact
An unauthenticated attacker can exploit this SSRF vulnerability to make the Arcane server perform arbitrary HTTP GET requests to internal or external systems. This can lead to information disclosure (confidentiality impact) and integrity impact by potentially interacting with internal services. There is no direct availability impact reported. The vulnerability affects any publicly accessible Arcane instance running a version prior to 1.17.3.
Mitigation Recommendations
Upgrade Arcane to version 1.17.3 or later, where this SSRF vulnerability is fixed. Since the vulnerability is fixed in this version, applying this official update fully mitigates the risk. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-10T17:31:45.785Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d962a81cc7ad14dae87051
Added to database: 4/10/2026, 8:50:48 PM
Last enriched: 4/18/2026, 2:28:11 PM
Last updated: 5/25/2026, 1:59:47 PM
Views: 130
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