CVE-2026-55185
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 4.0
- 5.1
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 - EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-25)
- CWE
- CWE-601
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-m999-j542-5w3r | Go | miniflux.app/v2 | <2.3.1 | 2.3.1 |
| GO-2026-5500 | Go | miniflux.app | all versions | no fix published |
| GO-2026-5500 | Go | miniflux.app/v2 | <2.3.1 | 2.3.1 |
References
- https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949
- https://github.com/miniflux/v2/pull/4362
- https://github.com/miniflux/v2/releases/tag/2.3.1
- https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r
- https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r