{"id":"CVE-2026-21885","aliases":["GHSA-xwh2-742g-w3wp","GO-2026-4287"],"url":"https://o3.security/vulnerability/CVE-2026-21885","summary":"Miniflux Media Proxy SSRF via /proxy endpoint allows access to internal network resources","details":"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.","published":"2026-01-08T13:57:25.445Z","modified":"2026-08-12T03:51:25.843293768Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"miniflux.app/v2","fixedVersion":"2.2.16"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21885.json"},{"type":"ADVISORY","url":"https://github.com/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21885"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:25.843293768Z"}}