{"id":"CVE-2026-55185","aliases":["GHSA-m999-j542-5w3r","GO-2026-5500"],"url":"https://o3.security/vulnerability/CVE-2026-55185","summary":"Miniflux 2: Open Redirect Bypass","details":"Miniflux 2 is an open source feed reader. Prior to 2.3.1, IsRelativePath in internal/urllib/url.go accepts redirect targets containing backslashes because Go URL parsing treats them as path characters. Browser backslash normalization converts them to forward slashes. An unauthenticated attacker can provide such a redirect_url value to the login flow, bypass the relative-path and host checks, and redirect a victim to an attacker-controlled external site. This issue is fixed in version 2.3.1.","published":"2026-08-21T20:19:14.122Z","modified":"2026-08-27T11:30:26.598978645Z","cvss":null,"epss":{"score":0.00426,"percentile":0.36,"asOf":"2026-09-13"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"miniflux.app/v2","fixedVersion":"2.3.1"}],"fix":{"url":"https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949","label":"miniflux/v2@c896baf"},"references":[{"type":"WEB","url":"https://github.com/miniflux/v2/releases/tag/2.3.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55185.json"},{"type":"ADVISORY","url":"https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55185"},{"type":"FIX","url":"https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949"},{"type":"FIX","url":"https://github.com/miniflux/v2/pull/4362"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T11:30:26.598978645Z"}}