CVE-2026-21885 json
Miniflux Media Proxy SSRF via /proxy endpoint allows access to internal network resources
published 2026-01-07 10 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-1186 , GHSA-xwh2-742g-w3wp , GO-2026-4287
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
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.
Patch / fix
- go miniflux.app/v2 2.2.16
- miniflux_project miniflux 2.2.16
- miniflux Debian 14 2.2.16-1
debian advisories DEBIAN-CVE-2026-21885
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260114T191543-150000.1.137.1
suse advisories SUSE-SU-2026:0142-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 10 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wp referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | miniflux.app/v2 | <2.2.16 |
2.2.16 |
| go | miniflux.app | all versions |
no fix listed |
Affected products
- miniflux v2
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wp
exploit, web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-21885
advisory
-
github.com
/miniflux/v2
package
Sources
- CVE List CVE-2026-21885
- GitHub Advisory GHSA-xwh2-742g-w3wp
- NVD CVE-2026-21885
- OSV GO-2026-4287
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.