Vulnerability · Published Jan 8, 2026 · Assigned by GitHub_M

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

Medium 6.5

In plain English

A medium-severity server-side request forgery in v2 from miniflux. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 77.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	miniflux	no fix listed	DEBIAN-CVE-2026-21885
Debian:14	miniflux	2.2.16-1	DEBIAN-CVE-2026-21885
Go	miniflux.app	no fix listed	GO-2026-4287
Go	miniflux.app/v2	2.2.16	GHSA-xwh2-742g-w3wp
Go	miniflux.app/v2	2.2.16	GO-2026-4287
Ubuntu:25.10	miniflux	no fix listed	UBUNTU-CVE-2026-21885

Affected products (as reported)

Vendor	Product	Versions
miniflux	v2	< 2.2.16

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

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