miniflux — security advisory

{
  "id": "007ea738e37f8e6bd3a749a7213b9c3eb1ae87653f064f0b374f91b6ad6dfa85",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-108735",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-108735",
    "summary": "Miniflux 2.3.0 through 2.3.3 contains a server-side request forgery vulnerability that allows authenticated users to reach internal addresses by setting a feed's proxy_url. Attackers can point proxy_url at loopback or internal hosts, bypassing FETCHER_ALLOW_PRIVATE_NETWORKS checks to probe internal ports and send proxy-style requests to internal services.",
    "evidence": "osv:UBUNTU-CVE-2026-108735",
    "products": [
      {
        "name": {
          "value": "miniflux",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.0.51-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.51-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.51-2ubuntu0.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.51-2ubuntu0.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.51-2ubuntu0.2+esm1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.51-2ubuntu0.3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.51-2ubuntu0.3+esm1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.51-2ubuntu0.3+esm2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "miniflux",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.2.16-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.3.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.3.2-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "miniflux",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.2.6-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.2.13-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.2.16-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.2.16-2ubuntu0.26.04.1~esm1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-108735",
      "aliases": [
        "UBUNTU-CVE-2026-108735"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "miniflux",
            "purl": "pkg:deb/ubuntu/miniflux?arch=source&distro=esm-apps%2Fnoble",
            "ecosystem": "Ubuntu:Pro:24.04:LTS"
          },
          "versions": [
            "2.0.51-1",
            "2.0.51-2",
            "2.0.51-2ubuntu0.1",
            "2.0.51-2ubuntu0.2",
            "2.0.51-2ubuntu0.2+esm1",
            "2.0.51-2ubuntu0.3",
            "2.0.51-2ubuntu0.3+esm1",
            "2.0.51-2ubuntu0.3+esm2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "miniflux",
                "binary_version": "2.0.51-2ubuntu0.3+esm2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "miniflux",
            "purl": "pkg:deb/ubuntu/miniflux?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "2.2.16-2",
            "2.3.0-1",
            "2.3.2-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "miniflux",
                "binary_version": "2.3.2-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "miniflux",
            "purl": "pkg:deb/ubuntu/miniflux?arch=source&distro=esm-apps%2Fresolute",
            "ecosystem": "Ubuntu:Pro:26.04:LTS"
          },
          "versions": [
            "2.2.6-2",
            "2.2.13-1",
            "2.2.16-2",
            "2.2.16-2ubuntu0.26.04.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108735.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "miniflux",
                "binary_version": "2.2.16-2ubuntu0.26.04.1~esm1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:59:49.049730679Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-108735"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-108735",
        "https://www.cve.org/CVERecord?id=CVE-2026-108735",
        "https://github.com/miniflux/v2",
        "https://github.com/miniflux/v2/blob/c4d54f87a81b30aa173fddf05d7ff83ae7da5796/internal/reader/fetcher/request_builder.go#L155-L220",
        "https://github.com/miniflux/v2/blob/c4d54f87a81b30aa173fddf05d7ff83ae7da5796/internal/urllib/url.go#L64-L72",
        "https://hackmd.io/@haind03/miniflux-feed-proxy-url-private-network-bypass",
        "https://www.vulncheck.com/advisories/miniflux-2.3.0-through-2.3.3-ssrf-via-per-feed-proxy-url"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-108735",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/1/score"
  },
  "source_id": "core-osv",
  "document_id": 359804,
  "published_at": "2026-10-11T13:17:00+00:00"
}