Medium 5.1Published Aug 21, 2026

CVE-2026-55185Miniflux 2: Open Redirect Bypass

Updated under an hour ago (2026-10-19 10:23 UTC)

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It affects miniflux v2. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for miniflux v2

Exploited in the last 30 days

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.

CVSS: 5.1 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-601
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

miniflux v2 miniflux:v2 (from the name)	before 2.3.1	CNA record

References

https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3rx-refsource-confirm
https://github.com/miniflux/v2/pull/4362x-refsource-misc
https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949x-refsource-misc
https://github.com/miniflux/v2/releases/tag/2.3.1x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.