{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:zammad:zammad:7.0.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "6.5.4"
              },
              {
                "introduced": "7.0.0"
              },
              {
                "last_affected": "7.0.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "15c7e6d4ffd95c84535d334b7c0ce0bc2fbc5228"
            },
            {
              "introduced": "f3228274c4feefac470d7efad12f240debd678bc"
            },
            {
              "last_affected": "f3228274c4feefac470d7efad12f240debd678bc"
            }
          ],
          "repo": "https://github.com/zammad/zammad",
          "type": "GIT"
        }
      ],
      "versions": [
        "7.0.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-2vgc-vfh2-rw75"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34719.json"
  },
  "details": "Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the webhook model was missing a proper validation for loop back addresses, or link-local addresses — only the URL scheme (HTTP/HTTPS) as well as the hostname was checked. This could end up in retrieving confidential metadata of cloud/hosting providers. The existing check is now extended and is applied when configuring webhooks as well as triggering webhook jobs. This vulnerability is fixed in 7.0.1 and 6.5.4.",
  "id": "CVE-2026-34719",
  "modified": "2026-07-15T01:49:12.084847221Z",
  "published": "2026-04-08T18:02:16.224Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34719.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/zammad/zammad/security/advisories/GHSA-2vgc-vfh2-rw75"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34719"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:H/SC:L/SI:N/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Zammad has a Server-side request forgery (SSRF) via webhooks"
}