{"id":"CVE-2026-45627","aliases":["GHSA-q2pj-8v84-9mh5","GO-2026-5561"],"url":"https://o3.security/vulnerability/CVE-2026-45627","summary":"Arcane: Unauthenticated reflected XSS via SVG color parameter in /api/app-images/logo enables admin account takeover","details":"Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to 1.19.0, the unauthenticated GET /api/app-images/logo endpoint reflects a user-supplied color query parameter into the body of an SVG document via strings.ReplaceAll with no escaping. The substitution lands inside a <style> element of the embedded logo.svg, allowing an attacker to close the style block and inject executable <script> content. Because the response is served as image/svg+xml and Arcane sets no Content-Security-Policy or X-Content-Type-Options headers, navigating a logged-in admin victim to a crafted URL executes attacker-controlled JavaScript in Arcane's origin and rides the victim's HttpOnly JWT cookie to fully compromise the admin account. This vulnerability is fixed in 1.19.0.","published":"2026-05-29T17:08:53.797Z","modified":"2026-08-12T03:51:26.415157155Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N"},"epss":{"score":0.00185,"percentile":0.08278,"asOf":"2026-08-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/getarcaneapp/arcane/backend","fixedVersion":"1.19.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45627.json"},{"type":"ADVISORY","url":"https://github.com/getarcaneapp/arcane/security/advisories/GHSA-q2pj-8v84-9mh5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45627"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:26.415157155Z"}}