{"id":"CVE-2026-56728","title":"Zammad is a web based open source helpdesk/customer support system","summary":"Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, a broken access control vulnerability exists in Zammad's GraphQL API. An authenticated user can access taskbar item data belonging to another user by cra…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-200","CWE-639"],"vendor":"zammad","product":"zammad","affected":["zammad < 7.0.2"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T19:17:42.760","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56728","references":[{"url":"https://github.com/zammad/zammad/commit/4ccd5d573023b66b0d0184914c92417e1780793f","label":"security-advisories@github.com"},{"url":"https://github.com/zammad/zammad/releases/tag/7.0.2","label":"security-advisories@github.com"},{"url":"https://github.com/zammad/zammad/security/advisories/GHSA-jvcg-5539-vvc3","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-25T18:38:13.258499Z"},"cvssSource":"cna","ingestedAt":"2026-09-25T18:14:20.464Z","slug":"CVE-2026-56728","body":"## Overview\n\nZammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, a broken access control vulnerability exists in Zammad's GraphQL API. An authenticated user can access taskbar item data belonging to another user by crafting a request with the target user's taskbar identifier. The taskbar feature stores transient state for active user sessions, including auto-saved ticket drafts. Under certain conditions, the authorization check for taskbar item access is not enforced, allowing a user to read another user's taskbar item data. This vulnerability is fixed in 7.0.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}