CVE-2026-21885Public exploitNetwork attack vector

Authenticated internal-resource disclosure via unrestricted media proxy

Published Jan 8, 2026 · Updated Jan 8, 2026

Server-side request forgery in Miniflux 2 before 2.2.16 allows remote authenticated users to read internal HTTP resources. The mediaProxy handler fetches signed media URLs derived from feed content without rejecting private, loopback, or link-local targets. A valid account and an enabled media proxy are required; the default http-only mode exposes responses reachable from the server, with no reported write or service-interruption impact.

CVSS severity6.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Miniflux 2 before 2.2.16 allows remote authenticated users to read internal HTTP resources. The mediaProxy handler fetches signed media URLs derived from feed content without rejecting private, loopback, or link-local targets. A valid account and an enabled media proxy are required; the default http-only mode exposes responses reachable from the server, with no reported write or service-interruption impact.

The record

CVE
CVE-2026-21885
Published
Jan 8, 2026
Updated
Jan 8, 2026
Vendor
Miniflux
Product
Miniflux 2
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.2.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Miniflux · Miniflux 2version=< 2.2.16

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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