5.1

CVE-2026-55185: Miniflux 2: Open Redirect Bypass

Deferred
AliasesUBUNTU-CVE-2026-55185DEBIAN-CVE-2026-55185GHSA-m999-j542-5w3r
Published 21-08-2026Last modified 24-08-2026

Vulnerability summary

CVE-2026-55185 is a medium (CVSS 5.1) Open Redirect vulnerability in miniflux v2. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.7% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.1/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.56%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:21483-1

Timeline

  1. 21-08-2026
    PublishedVulnerability first disclosed.
  2. 24-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.56%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

Increase +0.13 pp

From 0.43% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • minifluxAll versions (No fix recorded) | < 2.3.2-1
Go1 product
  • miniflux.appAll versions (No fix recorded)
Miniflux1 product
Miniflux.app1 product
  • v2< 2.3.1
Ubuntu1 product
  • minifluxAll versions (No fix recorded)

5 vendors · 5 products

References

8 links