CVE-2026-21885

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published1/8/2026

Last Modified1/12/2026

Sourcenvd

Honeypot Sightings0

Affected Products

miniflux_project:miniflux

Weaknesses (CWE)

CWE-918

References

https://github.com/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wp(security-advisories@github.com)

https://github.com/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wp(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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