{"action":"Upgrade github.com/getarcaneapp/arcane/backend to 1.17.3 or later.","affected":[{"fixed":"1.17.3","introduced":"0"}],"component":"github.com/getarcaneapp/arcane/backend","cve_ids":["CVE-2026-40242"],"ecosystem":"Go","epss":0.00621,"exploited":false,"fixed_versions":["1.17.3"],"ghsa_id":"GHSA-ff24-4prj-gpmj","id":"tcs_01M5KGKRAK7FYJZFCRHGBVQSPC","modified_at":"2026-06-25T19:45:34.727123744Z","published_at":"2026-06-25T18:43:19Z","references":["https://osv.dev/vulnerability/GO-2026-5356","https://github.com/getarcaneapp/arcane/security/advisories/GHSA-ff24-4prj-gpmj","https://nvd.nist.gov/vuln/detail/CVE-2026-40242","https://github.com/getarcaneapp/arcane/releases/tag/v1.17.3"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GO-2026-5356","url":"https://osv.dev/vulnerability/GO-2026-5356"},{"source":"nvd","source_id":"CVE-2026-40242","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40242"}],"summary":"Arcane has Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint in github.com/getarcaneapp/arcane/backend"}