6.5

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

Analyzed
AliasesUBUNTU-CVE-2026-21885DEBIAN-CVE-2026-21885GHSA-xwh2-742g-w3wp
Published 08-01-2026Last modified 08-01-2026

Vulnerability summary

CVE-2026-21885 is a medium (CVSS 6.5) Server-Side Request Forgery (SSRF) vulnerability in miniflux_project miniflux. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0142-1

Timeline

  1. 08-01-2026
    PublishedVulnerability first disclosed.
  2. 08-01-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.29% 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

1 found
  • githubUnverified

    V2

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • minifluxAll versions (No fix recorded) | < 2.2.16-1
Go1 product
  • miniflux.appAll versions (No fix recorded)
Miniflux1 product
  • v2< 2.2.16
Miniflux_project1 product
Miniflux.app1 product
  • v2< 2.2.16
Ubuntu1 product
  • minifluxAll versions (No fix recorded)

6 vendors · 6 products

References

6 links