ntfy — security advisory

{
  "id": "8e06e425eb41b96a42490151aa4f87e2deece6243e94e45e8dd86f97a90ed325",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-39087",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-39087",
    "summary": "ntfy before 2.22.0 allows SSRF because of an unanchored regular expression for web push endpoint URLs.",
    "evidence": "osv:UBUNTU-CVE-2026-39087",
    "products": [
      {
        "name": {
          "value": "ntfy",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.11.0-2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ntfy",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.11.0-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.24.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.27.0-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ntfy",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.11.0-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.11.0-3",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.11.0-3ubuntu0.26.04.1~esm1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "UBUNTU-CVE-2026-39087",
      "aliases": [
        "UBUNTU-CVE-2026-39087"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        },
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ntfy",
            "purl": "pkg:deb/ubuntu/ntfy?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "2.11.0-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39087.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ntfy",
                "binary_version": "2.11.0-2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ntfy",
            "purl": "pkg:deb/ubuntu/ntfy?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "2.11.0-3",
            "2.24.0-1",
            "2.27.0-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39087.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ntfy",
                "binary_version": "2.27.0-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ntfy",
            "purl": "pkg:deb/ubuntu/ntfy?arch=source&distro=esm-apps%2Fresolute",
            "ecosystem": "Ubuntu:Pro:26.04:LTS"
          },
          "versions": [
            "2.11.0-2",
            "2.11.0-3",
            "2.11.0-3ubuntu0.26.04.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39087.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ntfy",
                "binary_version": "2.11.0-3ubuntu0.26.04.1~esm1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T13:00:03.115212746Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-39087"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-39087",
        "https://www.cve.org/CVERecord?id=CVE-2026-39087"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-39087",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 360200,
  "published_at": "2026-04-23T16:16:00+00:00"
}