Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Miniflux Project | Miniflux | >= 2.0.0, < 2.2.16 |
Related Weaknesses (CWE)
References
- https://github.com/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wpExploitVendor Advisory
- https://github.com/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wpExploitVendor Advisory
FAQ
What is CVE-2026-21885?
CVE-2026-21885 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 (SSR...
How severe is CVE-2026-21885?
CVE-2026-21885 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-21885?
Check the references section above for vendor advisories and patch information. Affected products include: Miniflux Project Miniflux.