CVE-2026-21885
Miniflux Media Proxy SSRF via /proxy endpoint allows access to internal network resources in miniflux.app
Description
Miniflux 2 is an open source feed reader. Prior to version 2.2.16, Miniflux's media proxy endpoint (`GET /proxy/{encodedDigest}/{encodedURL}`) can be abused to perform Server-Side Request Forgery (SSRF). An authenticated user can cause Miniflux to generate a signed proxy URL for attacker-chosen media URLs embedded in feed entry content, including internal addresses (e.g., localhost, private RFC1918 ranges, or link-local metadata endpoints). Requesting the resulting `/proxy/...` URL makes Miniflux fetch and return the internal response. Version 2.2.16 fixes the issue.
How to fix CVE-2026-21885
To remediate CVE-2026-21885, upgrade the affected package to a fixed version below.
- —no fix listed
- —no fix listed
- —upgrade to 2.2.16 or later
- —upgrade to 2.2.16 or later
Is CVE-2026-21885 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0
- from 0
- from 0, < 2.2.16
- from 0, < 2.2.16
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |