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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-601"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55185.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.3.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "c896bafdaa19c3f280b02b1059f84706495f1949"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "2.3.1",
"range": [
{
"fixed": "9a774083ab4f61f7d604fb950bdd6aff029824a1"
}
],
"source": "REFERENCES_TAG"
}
]
}