CVE-2026-55185— Miniflux 2: Open Redirect Bypass
Quick assessment
Affected
miniflux v2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Miniflux 2 是一款开源的 RSS 阅读器。在 2.3.1 版本之前，internal/urllib/url.go 中的 IsRelativePath 函数存在安全漏洞，因为它接受了包含反斜杠（backslash）的重定向目标地址。这是由于 Go 的 URL 解析机制将反斜杠视为路径字符所致。然而，浏览器在规范化处理时会将反斜杠转换为正斜杠（forward slash）。未认证的攻击者可以在登录流程中提供包含此类反斜杠的 redirect_url 值，从而绕过相对路径和主机名检查，将受害者重定向到由攻击者控
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I. Basic Information for CVE-2026-55185
Vulnerability Information
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Vulnerability Title
Miniflux 2: Open Redirect Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-55185
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Patches & Fixes for CVE-2026-55185 (2)
Vendor Advisories for CVE-2026-55185 (1)
Vendor Pages for CVE-2026-55185 (1)
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🔗 Release Miniflux 2.3.1 · miniflux/v2 · GitHub x_refsource_MISC
IV. Related Vulnerabilities
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CVE-2026-21885
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CVE-2023-27591
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Same weakness: CWE-601
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V. Comments for CVE-2026-55185
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