{"id":"CVE-2026-63205","revision":"d63a3e3cc6624ec08bbb9a2f7f88b85d","records":[{"revision":"d63a3e3cc6624ec08bbb9a2f7f88b85d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63205","aliases":[],"title":"Zammad: Channel admins can read unauthorized attachments via signature rich-text body","description":"Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when creating or updating an email signature, Zammad processes inline images referenced in the signature body. If a signature body contains an HTML img tag pointing to any existing attachment, the system copies that attachment into a new signature-owned record, without checking whether the user has permission to access the original attachment. The newly created copy is then downloadable by the same channel-admin user, because attachment access is determined by the copy's owner (the signature), not the original object (e.g., a ticket or knowledge-base article). This allows a user with any of the admin.channel_email, admin.channel_google, admin.channel_microsoft365, or admin.channel_microsoft_graph permissions to read attachments they would otherwise be denied access to, such as ticket attachments belonging to groups they are not a member of. This issue is fixed in version 7.1.2.","state":0,"publishedAt":"2026-09-25T18:13:25.176+00:00","modifiedAt":"2026-09-29T19:40:34.778+00:00","affected":[{"ecosystem":"Vendor product","name":"zammad","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"zammad\",\n                    \"product\": \"zammad\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 7.1.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.1,"severity":"MEDIUM"}],"references":["https://github.com/zammad/zammad/security/advisories/GHSA-pp8r-x7pp-5qj5","https://github.com/zammad/zammad/commit/f3e4da83621efad8443a4e9fe6bd87befad47c44"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63205","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63205","identifiers":["CVE-2026-63205"]},"retained":false,"historicalAffected":[]}],"coverage":[]}