CVE-2026-21885 – Miniflux Media Proxy SSRF via /proxy endpoint allows access to internal network resources

CVE ID : CVE-2026-21885

Published : Jan. 8, 2026, 1:57 p.m. | 31 minutes ago

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.

Severity: 0.0 | NA

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