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TI-2026-17586 Aliases CVE-2026-21885GHSA-xwh2-742g-w3wp

Miniflux Media Proxy SSRF via /proxy endpoint allows access to internal network resources

Priority MEDIUM 62CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.003 22nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed v2 (miniflux): 2.2.16miniflux.app/v2 (Go): 2.2.16

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
minifluxv2before 2.2.162.2.16Patch availableCNA
—miniflux.app/v2 (Go)before 2.2.162.2.16Patch availableGHSA-xwh2-742g-w3wp
  • v2 Vendorminiflux Affected before 2.2.16 Fixed in 2.2.16 Patch available CNA
  • miniflux.app/v2 (Go) Vendor— Affected before 2.2.16 Fixed in 2.2.16 Patch available GHSA-xwh2-742g-w3wp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:miniflux_project:miniflux:*:*:*:*:*:go:*:*2.0.0 to before 2.2.16Vulnerableminiflux
  • cpe:2.3:a:miniflux_project:miniflux:*:*:*:*:*:go:*:* Versions 2.0.0 to before 2.2.16 Vulnerable ·miniflux

Remediation

  • Fix · CNA v2 (miniflux) Fixed in 2.2.16
  • Fix · GHSA-xwh2-742g-w3wp miniflux.app/v2 (Go) Fixed in 2.2.16 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21885
  2. 2026-10-03 Alias added: GHSA-xwh2-742g-w3wp

References

Exploit 1

Advisory 1

Other 1

  • TI-2025-41410 Miniflux 2 has an Open Redirect via protocol-relative `redirect_url` CVSS 4.0MEDIUM 5.3
  • TI-2023-12301 Unauthenticated Miniflux user can bypass allowed networks check to obtain Prometheus metrics CVSS 3.1HIGH 7.5
  • TI-2023-12302 Stored XSS in Miniflux when opening a broken image due to unescaped ServerError in proxy handler CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences