# CVE-2026-55185: Miniflux miniflux-v2 open redirect bypass

Source: https://junglewise.ai/threats/cve-2026-55185-miniflux-miniflux-v2-open-redirect-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-21. Updated: 2026-06-19  
License: CC BY 4.0 with a link back

CVE-2026-55185 · Severity: medium · CVSS 4 · Published 2026-08-21

Miniflux, a minimalist RSS feed reader, is vulnerable to an open redirect flaw. Attackers can trick users into clicking a link that appears to belong to the trusted Miniflux application but instead redirects them to a malicious external website. This can be used in phishing campaigns to steal user credentials or deliver malware by exploiting the user's trust in the original domain.

Technologies: [miniflux.app (Go)](https://junglewise.ai/threats/technologies/miniflux-app), [miniflux.app/v2 (Go)](https://junglewise.ai/threats/technologies/miniflux-app-v2). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-55185 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-55185 being exploited in the wild.

**How severe is CVE-2026-55185?** Medium severity, with a CVSS score of 4, published 21 August 2026.

**Which products and versions are affected?** miniflux.app (Go) SEMVER:introduced=0; miniflux.app/v2 (Go) <= 2.3.0, SEMVER:introduced=0,fixed=2.3.1; Miniflux <= 2.3.0.

**Is there a fix for CVE-2026-55185?** Yes. miniflux.app/v2 (Go): upgrade to 2.3.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-55185 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-55185?** Check whether you run miniflux.app (Go), miniflux.app/v2 (Go) or Miniflux at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- miniflux.app/v2 (Go): upgrade to 2.3.1 or later

  ```sh
  go get miniflux.app/v2@v2.3.1
  ```


## Technical details

An open redirect vulnerability exists in Miniflux v2 due to insufficient validation in the IsRelativePath function. While the application attempts to block absolute URLs and protocol-relative paths (e.g., //example.com), it fails to account for backslash characters that browsers automatically normalize. An attacker can use a payload like '/\example.com' to bypass the relative path check. The backend treats this as a relative path because it lacks a host or scheme, but modern browsers interpret the backslash as a forward slash, resulting in a redirection to an external domain. This can be exploited via the redirect_url parameter during login or other navigation events. The issue is fixed in version 2.3.1.

## Affected products

- miniflux miniflux/v2 <= 2.3.0

## Identifiers

- CVE-2026-55185
- GHSA-m999-j542-5w3r
- GO-2026-5500

## Timeline

- 2026-06-18: disclosed
- 2026-06-19: advisory
- 2026-06-19: patched: Fixed in version 2.3.1

## References

- [https://api.github.com/users/Fushuling](https://api.github.com/users/Fushuling)
- [https://github.com/Fushuling](https://github.com/Fushuling)
- [https://api.github.com/users/Fushuling/gists%7B/gist_id%7D](https://api.github.com/users/Fushuling/gists%7B/gist_id%7D)
- [https://api.github.com/users/Fushuling/repos](https://api.github.com/users/Fushuling/repos)
- [https://avatars.githubusercontent.com/u/98574309?v=4](https://avatars.githubusercontent.com/u/98574309?v=4)
- [https://api.github.com/users/Fushuling/events%7B/privacy%7D](https://api.github.com/users/Fushuling/events%7B/privacy%7D)

## Related threats

- [Miniflux server-side request forgery via proxy_url](https://junglewise.ai/threats/cve-2026-108735-miniflux-2-3-0-through-2-3-3-contains-a-server-side-request)
- [GO-2026-4287 - Miniflux Media Proxy SSRF via /proxy endpoint allows access to internal network resources in miniflux.app](https://junglewise.ai/threats/cve-2026-21885-miniflux-media-proxy-ssrf-via-proxy-endpoint-allows-access-to)
- [GO-2025-4226 - Miniflux has an Open Redirect via protocol-relative redirect_url in miniflux.app](https://junglewise.ai/threats/cve-2025-67713-miniflux-has-an-open-redirect-via-protocol-relative-redirect-url)
- [Miniflux Media Proxy vulnerable to Stored Cross-site Scripting due to improper Content-Security-Policy configuration](https://junglewise.ai/threats/cve-2025-31483-miniflux-media-proxy-vulnerable-to-stored-cross-site-scripting)
- [Stored XSS in Miniflux when opening a broken image due to unescaped ServerError in proxy handler](https://junglewise.ai/threats/cve-2023-27592-stored-xss-in-miniflux-when-opening-a-broken-image-due-to)