{"schema":"threatline.record/2","record":{"id":"CVE-2026-56728","aliases":["GHSA-jvcg-5539-vvc3"],"summary":"Zammad: Cross-User Taskbar Item Access Control Vulnerability","details":"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 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.","categories":["Applications & CMS"],"product":"zammad","vendor":"zammad","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-56728","source_modified_at":"2026-09-25T18:38:22.817Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"zammad","vendor":"zammad","versions":[{"version":"< 7.0.2","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.0033,"percentile":0.24868,"score_date":"2026-10-23"},"published_at":"2026-09-25T17:10:16.262Z","modified_at":"2026-09-25T18:38:22.817Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-56728","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-25T18:38:22.817Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-56728","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/zammad/zammad/security/advisories/GHSA-jvcg-5539-vvc3","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/zammad/zammad/commit/4ccd5d573023b66b0d0184914c92417e1780793f","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/zammad/zammad/releases/tag/7.0.2","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-25T18:38:13.258499Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-25T18:38:22.817Z","content_hash":"cb488d445a60f444167658c095ce24364027cd226aa8c1fd2d7e15eef2b8dc23"}}