{"id":"CVE-2026-65828","summary":"Zammad: Pending upload deletion bypass via legacy attachment endpoint","details":"Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the legacy destroy_form action on AttachmentsController deletes UploadCache Store records based solely on a user-supplied form_id without verifying that the requesting user owns those records. An authenticated attacker who learns another user's pending-upload UUID can silently remove temporary file uploads before the victim submits their ticket or article. This issue is fixed in version 7.1.2.","aliases":["GHSA-x4f3-367g-m93g"],"modified":"2026-10-28T02:30:21.398488815Z","published":"2026-09-25T17:28:13.159Z","database_specific":{"cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65828.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65828.json"},{"type":"ADVISORY","url":"https://github.com/zammad/zammad/security/advisories/GHSA-x4f3-367g-m93g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65828"},{"type":"FIX","url":"https://github.com/zammad/zammad/commit/3b755736fdbee8ff6ddf53661d6912d3d3028325"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zammad/zammad","events":[{"introduced":"0"},{"fixed":"7195a4a3e3ba9e801b6ad93f191ae423ed573d15"},{"fixed":"3b755736fdbee8ff6ddf53661d6912d3d3028325"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"7.1.2"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"range":[{"fixed":"3b755736fdbee8ff6ddf53661d6912d3d3028325"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["7.1.1","7.1.0","7.1.0-alpha","7.0.0-alpha","6.6.0-alpha","6.5.0-alpha","6.4.0-alpha","6.3.0-alpha","6.2.0-alpha","6.1.0-alpha","6.0.0-alpha","5.5.0-alpha","5.4.0-alpha","5.3.0-alpha","5.2.0-alpha","3.7.0","1.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65828.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"}]}