{"id":"CVE-2026-59563","aliases":["EUVD-2026-88244","GHSA-6wjq-5f4c-p8f7"],"status":"published","title":"HMAC Confirmation Token Unbinding in zscaler-mcp-server","description":"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.","severity":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00131,"percentile":0.02706,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-305"],"published":"2026-09-28T12:54:52Z","modified":"2026-11-04T02:47:58Z","products":[{"vendor":"zscaler","product":"zscaler-mcp-server"}],"references":[{"url":"https://github.com/zscaler/zscaler-mcp-server/pull/41","tags":["fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59563"},{"url":"https://github.com/advisories/GHSA-6wjq-5f4c-p8f7"}],"sources":{"cve":[{"id":"CVE-2026-59563","title":"HMAC Confirmation Token Unbinding in zscaler-mcp-server","description":"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.","status":"published","published":"2026-09-28T12:54:52.446Z","modified":"2026-09-28T13:31:27.587Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T14:19:58.560602Z"}],"euvd":[{"id":"EUVD-2026-88244","description":"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.","status":"published","published":"2026-09-28T12:54:52Z","modified":"2026-09-28T13:31:27Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T17:27:53.908541Z"}],"ghsa":[{"id":"GHSA-6wjq-5f4c-p8f7","title":"Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not...","description":"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.","status":"published","published":"2026-09-28T15:31:51Z","modified":"2026-09-28T15:31:57Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T15:12:32.013867Z"}],"nvd":[{"id":"CVE-2026-59563","description":"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.","status":"published","published":"2026-09-28T13:17:22.16Z","modified":"2026-09-28T15:17:17.493Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T14:12:52.081323Z"}],"osv":[{"id":"CVE-2026-59563","description":"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.","status":"published","published":"2026-09-28T13:17:22.16Z","modified":"2026-11-04T02:47:58.06909698Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-04T03:25:28.514393Z"}]}}