CVE Catalog

CVE-2026-55185

MediumCVSS 5.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.43%

35th percentile - higher than 35% of all known CVEs

Summary

Miniflux 2 prior to 2.3.1 accepts redirect targets containing backslashes, which browsers normalize to forward slashes. An unauthenticated attacker can exploit this in the login flow to redirect a victim to an attacker-controlled external site, bypassing relative-path and host checks.

Risk Assessment

Risk of phishing and redirecting users to malicious sites, potentially leading to credential theft or malware infection.

Recommendation

Update Miniflux to version 2.3.1 or later, which includes a fix for this vulnerability.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS