{"id":"CVE-2026-55185","state":"PUBLISHED","title":"Miniflux 2: Open Redirect Bypass","description":"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.","publishedAt":"2026-08-21T20:19:14.122Z","updatedAt":"2026-08-24T19:46:50.850Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["miniflux v2"],"affected":[{"vendor":"miniflux","product":"v2","versions":[{"version":"< 2.3.1","status":"affected"}]}],"references":["https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r","https://github.com/miniflux/v2/pull/4362","https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949","https://github.com/miniflux/v2/releases/tag/2.3.1"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55185.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55185","state":"PUBLISHED","datePublished":"2026-08-21T20:19:14.122Z","dateUpdated":"2026-08-24T19:46:50.850Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T15:20:43.086Z"},"containers":{"cna":{"title":"Miniflux 2: Open Redirect Bypass","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"miniflux","product":"v2","versions":[{"version":"< 2.3.1","status":"affected"}]}],"references":[{"url":"https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r","name":"https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/miniflux/v2/pull/4362","name":"https://github.com/miniflux/v2/pull/4362","tags":["x_refsource_MISC"]},{"url":"https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949","name":"https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949","tags":["x_refsource_MISC"]},{"url":"https://github.com/miniflux/v2/releases/tag/2.3.1","name":"https://github.com/miniflux/v2/releases/tag/2.3.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.1,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-21T20:19:14.122Z"},"source":{"advisory":"GHSA-m999-j542-5w3r","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-24T19:46:24.951438Z","id":"CVE-2026-55185","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-24T19:46:50.850Z"}}]}}}