Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137

{
  "id": "2cb0dac58a215342a66dae9484176e0291959c73285231704f46ce516d2785a2",
  "url": "https://osv.dev/vulnerability/CVE-2026-87939",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137",
    "summary": "Improper Neutralization of Input During Web Page Generation (\"Cross-site Scripting\") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.",
    "evidence": "osv:CVE-2026-87939",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-87939",
      "aliases": [
        "CVE-2026-87939",
        "DRUPAL-CONTRIB-2026-137"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.drupalcode.org/project/feed_block",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c8ea9958d5d28969c8b015e12c09dd0b98031450"
                },
                {
                  "introduced": "69f0291141f8d80405212b2a86df5b35fe5470fe"
                },
                {
                  "fixed": "174b6adb58522b00f6f9ef2b2b3a7c969a7b5ec9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.0.0"
                      },
                      {
                        "fixed": "2.0.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "3.0.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.0.1",
            "3.0.0",
            "2.0.1",
            "2.0.0",
            "8.x-1.1",
            "8.x-1.0",
            "7.x-1.1",
            "7.x-1.0",
            "6.x-1.0-rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-87939.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.987190947Z",
      "provider": "osv",
      "references": [
        "https://git.drupalcode.org/project/feed_block",
        "https://www.drupal.org/project/feed_block",
        "https://www.drupal.org/sa-contrib-2026-137",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87939.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-87939"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "drupal",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87939.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-87939",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503470,
  "published_at": "2026-10-22T01:22:02.857+00:00"
}