CVE-2026-40242

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40242", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-10T17:31:45.785Z", "datePublished": "2026-04-10T20:34:12.777Z", "dateUpdated": "2026-04-13T20:54:36.822Z"}, "containers": {"cna": {"title": "Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj"}, {"name": "https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3"}], "affected": [{"vendor": "getarcaneapp", "product": "arcane", "versions": [{"version": "< 1.17.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-10T20:34:12.777Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-ff24-4prj-gpmj", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-13T20:54:32.958737Z", "id": "CVE-2026-40242", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-13T20:54:36.822Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-40242", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-13T20:54:32.958737Z"}}}], "references": [{"url": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-13T20:54:27.568Z"}}], "cna": {"title": "Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint", "source": {"advisory": "GHSA-ff24-4prj-gpmj", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "getarcaneapp", "product": "arcane", "versions": [{"status": "affected", "version": "< 1.17.3"}]}], "references": [{"url": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj", "name": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3", "name": "https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-918", "description": "CWE-918: Server-Side Request Forgery (SSRF)"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-10T20:34:12.777Z"}}}, "cveMetadata": {"cveId": "CVE-2026-40242", "state": "PUBLISHED", "dateUpdated": "2026-04-13T20:54:36.822Z", "dateReserved": "2026-04-10T17:31:45.785Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-04-10T20:34:12.777Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "arcane", "vendor": "getarcaneapp", "versions": [{"status": "affected", "version": "< 1.17.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:getarcane:arcane:*:*:*:*:*:*:*:*", "matchCriteriaId": "908A8D3F-26B0-4A9B-81F5-85D03CBF0E12", "versionEndExcluding": "1.17.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Arcane es una interfaz para gestionar contenedores Docker, im\u00e1genes, redes y vol\u00famenes. Anterior a la 1.17.3, el endpoint /API/templates/fetch acepta un par\u00e1metro url proporcionado por el llamador y realiza una solicitud HTTP GET del lado del servidor a esa URL sin autenticaci\u00f3n y sin validaci\u00f3n de esquema de URL o de host. La respuesta del servidor se devuelve directamente al llamador. tipo. Esto constituye una vulnerabilidad SSRF no autenticada que afecta a cualquier instancia de Arcane accesible p\u00fablicamente. Esta vulnerabilidad se corrige en la 1.17.3."}], "id": "CVE-2026-40242", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40242", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-13T20:54:32.958737Z", "version": "2.0.3"}}]}, "published": "2026-04-10T21:16:27.747", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.17.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "arcane", "source": "cna", "vendor": "getarcaneapp"}, "product": "arcane", "vendor": "getarcaneapp"}], "analysis": {"en": {"generated_at": "2026-04-22T19:50:17.730426+00:00", "value": {"mitigation_remediation": ["Upgrade Arcane to version 1.17.3 or newer, which removes the unvalidated URL handling from /api/templates/fetch.", "If an upgrade is not immediately possible, restrict access to the /api/templates/fetch endpoint by placing a firewall or reverse\u2011proxy rule that denies external requests or requires authentication.", "Implement network segmentation so that the Arcane host cannot access sensitive internal services, limiting the impact of a successful SSRF.", "Monitor request logs for abnormal use of /api/templates/fetch and investigate any unexpected outbound HTTP requests."], "summary": {"action": "Apply patch", "impact": "Server\u2011Side Request Forgery (SSRF)"}, "threat_synthesis": {"affected_systems": "Any publicly exposed installation of Arcane from the getarcaneapp vendor running a version prior to 1.17.3 is susceptible. The vulnerability affects the /api/templates/fetch endpoint in the Arcane container\u2011management interface, which manages Docker resources. The fix is included in release 1.17.3 and later.", "description_and_impact": "Arcane permits unauthenticated remote users to supply a URL to the /api/templates/fetch endpoint. The application performs an HTTP GET to that URL without verifying the scheme or host and then returns the raw response to the requester. This lack of validation constitutes a server\u2011side request forgery flaw that gives an attacker the ability to query any resource reachable from the Arcane host, potentially leaking internal data or enabling further lateral movement.", "risk_and_exploitability": "The CVSS base score of 7.2 indicates moderate\u2011to\u2011high severity; the reported exploitation likelihood is low, as indicated by the EPSS score of 1.525%, and the vulnerability is not catalogued in known exploit databases. Because the flaw is reachable over the public network without authentication or authorization, an attacker can simply craft a request to the endpoint to direct the server to any internal or external address. Absence of host or scheme checks makes exploitation trivial for a determined adversary, and the ability to retrieve raw responses provides a rich source of reconnaissance. The overall risk is therefore amplified by the lack of access controls and the sensitive nature of the data that may be accessible internally."}}}}, "created": "2026-04-13T12:42:33.403762+00:00", "updated": "2026-04-22T20:00:08.827373+00:00", "vendors": ["getarcaneapp", "getarcaneapp$PRODUCT$arcane"]}