SSRF Vulnerability in Miniflux Feed Reader by Miniflux
CVE-2026-21885

6.5MEDIUM

Key Information:

Vendor

Miniflux

Status
V2
Vendor
CVE Published:
8 January 2026

What is CVE-2026-21885?

Miniflux 2, an open source feed reader, is vulnerable to Server-Side Request Forgery (SSRF) attacks prior to version 2.2.16. This flaw allows authenticated users to exploit the media proxy endpoint (GET /proxy/{encodedDigest}/{encodedURL}) to generate signed proxy URLs for arbitrary media URLs contained in feed entries. This includes the potential exposure of internal addresses such as localhost and private IP ranges, enabling attackers to retrieve internal responses by accessing crafted URLs. The vulnerability is addressed in version 2.2.16.

Affected Version(s)

v2 < 2.2.16

References

https://github.com/miniflux/v2/security/advisories/GHSA-x...
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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