Security advisory

{
  "id": "3ef391619ca1ab945c5a49229fca3a0e915be406a885e98d808c9dbca39a53a6",
  "url": "https://osv.dev/vulnerability/CVE-2026-59563",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-59563",
    "summary": "Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2.",
    "evidence": "osv:CVE-2026-59563",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-59563",
      "aliases": [
        "CVE-2026-59563"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zscaler/zscaler-mcp-server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "559a074c034412f6001ad23e96afd1a77bd958f7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.7.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.7.1",
            "v0.7.0",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.0",
            "v0.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59563.json"
          }
        }
      ],
      "modified": "2026-10-20T12:02:14.394673148Z",
      "provider": "osv",
      "references": [
        "https://github.com/zscaler/zscaler-mcp-server/pull/41"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-59563",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387245,
  "published_at": "2026-09-28T13:17:22.16+00:00"
}