spotweb — security advisory

{
  "id": "272e43a88901144bb4e4c97f258384326b60ecd2f4ac928948cbb779be67c2ac",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-108546",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-108546",
    "summary": "Spotweb through 1.5.8 contains an OS command injection vulnerability in the runcommand NZB handler that allows remote attackers to execute commands by publishing spots with malicious titles. Attackers can post self-signed spots over Usenet with shell metacharacters in the title, which are substituted unescaped for $SPOTTITLE and passed to exec() when a user downloads the spot, running commands as the Spotweb PHP process.",
    "evidence": "osv:UBUNTU-CVE-2026-108546",
    "products": [
      {
        "name": {
          "value": "spotweb",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "20130826+dfsg3-4",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "spotweb",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "20130826+dfsg3-4",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-108546",
      "aliases": [
        "UBUNTU-CVE-2026-108546"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "spotweb",
            "purl": "pkg:deb/ubuntu/spotweb?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
          },
          "versions": [
            "20130826+dfsg3-4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108546.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "spotweb",
                "binary_version": "20130826+dfsg3-4"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "spotweb",
            "purl": "pkg:deb/ubuntu/spotweb?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "20130826+dfsg3-4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108546.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "spotweb",
                "binary_version": "20130826+dfsg3-4"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T10:01:22Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-108546"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-108546",
        "https://www.cve.org/CVERecord?id=CVE-2026-108546",
        "https://github.com/spotweb/spotweb",
        "https://github.com/spotweb/spotweb/blob/1.5.8/lib/services/NzbHandler/Services_NzbHandler_Runcommand.php#L41-L45",
        "https://hackmd.io/@haind/spotweb-runcommand-title-injection",
        "https://www.vulncheck.com/advisories/spotweb-through-1.5.8-os-command-injection-via-spot-title-in-runcommand-integration"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-108546",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/1/score"
  },
  "source_id": "core-osv",
  "document_id": 352311,
  "published_at": "2026-10-10T15:16:00+00:00"
}