{"answers":{"affected":"3 open source packages ship an affected version, including github.com/getarcaneapp/arcane/backend. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40242 exists.","fix":"Upgrade github.com/getarcaneapp/arcane/backend to 1.17.3 or later.","what":"CVE-2026-40242 is a high-severity server-side request forgery vulnerability in getarcaneapp arcane, published on 10 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-40242 and fix it if it is affected.\n\nWhat it is: CVE-2026-40242 is a high-severity server-side request forgery vulnerability in getarcaneapp arcane, published on 10 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40242 exists.\n\nAffected packages and fixed versions:\n- github.com/getarcaneapp/arcane/backend (Go): affected all versions; fixed in 1.17.3\n- github.com/getarcaneapp/arcane/backend (Go): affected all versions; fixed in 1.17.3\n- github.com/getarcaneapp/arcane/backend (Go): affected all versions; fixed in 1.17.3\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-40242/ (Markdown: https://insights.sbomify.com/CVE-2026-40242/index.md)","id":"CVE-2026-40242","markdown":"https://insights.sbomify.com/CVE-2026-40242/index.md","name":"CVE-2026-40242","record":{"aliases":["GHSA-ff24-4prj-gpmj","GO-2026-5356"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Docker management interface","requires_auth":"none","summary":"Unauthenticated attackers can exploit an SSRF vulnerability in the template fetch endpoint to read internal server responses.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"arcane","vendor":"getarcane"}],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2026/CVE-2026-40242.yaml","stars":null,"title":"Arcane \u003c= 1.17.2 - Server-Side Request Forgery"}],"tier":"weaponised"},"has_fix":true,"headline":"Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint","id":"CVE-2026-40242","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Incus OVN TLS verification accepts peer-supplied roots and permits endpoint impersonation","id":"CVE-2026-40243"},"packages":[{"ecosystem":"Go","fixed":["1.17.3"],"introduced":["0"],"last_affected":[],"package":"github.com/getarcaneapp/arcane/backend","purl":null,"source":"GHSA-ff24-4prj-gpmj"},{"ecosystem":"Go","fixed":["1.17.3"],"introduced":["0"],"last_affected":[],"package":"github.com/getarcaneapp/arcane/backend","purl":"pkg:golang/github.com/getarcaneapp/arcane/backend","source":"GHSA-ff24-4prj-gpmj"},{"ecosystem":"Go","fixed":["1.17.3"],"introduced":["0"],"last_affected":[],"package":"github.com/getarcaneapp/arcane/backend","purl":"pkg:golang/github.com/getarcaneapp/arcane/backend","source":"GO-2026-5356"}],"prev":{"headline":"Helpy 2.8.0 - Stored XSS in knowledgebase Doc body rendering","id":"CVE-2026-40230"},"products":["arcane"],"published":"2026-04-10","related":[{"cvss_score":8.7,"headline":"Arcane Vulnerable to Unauthenticated Disclosure of Custom Compose Template Content (incl. `.env` secrets)","id":"CVE-2026-42461","kev_date_added":null,"published":"2026-05-09"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-13","vendors":["getarcaneapp"]},"summary":"Unauthenticated attackers can exploit an SSRF vulnerability in the template fetch endpoint to read internal server responses.","url":"https://insights.sbomify.com/CVE-2026-40242/"}