{"id":"CVE-2026-63206","revision":null,"records":[{"revision":"f4dd98ff86a64e1fa02a90d7a650fb16","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63206","aliases":[],"title":"Zammad: Remote image tracking bypass via shortened URL scheme","description":"Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, zammad's HTML sanitizer, which blocks remote images in ticket articles and email views, can be bypassed using a shortened URL format that omits the double slash after the scheme (for example a shortened HTTP URL instead of a shortened HTTP URL). Modern browsers treat both forms as equivalent remote URLs. As a result, an attacker who sends a crafted email or ticket can cause the recipient's browser to silently load an image from an external server, revealing when and by whom the ticket was opened. Zammad's \"remote content blocked\" warning is not shown because the sanitizer does not recognize the shortened form as remote. This issue is fixed in version 7.1.2.","state":0,"publishedAt":"2026-09-25T18:14:06.612+00:00","modifiedAt":"2026-09-25T19:46:54.438+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:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/zammad/zammad/security/advisories/GHSA-fpwp-w2p4-hqg7","https://github.com/zammad/zammad/commit/a5878f37e4010f0b3bec85dae35af964cc1c8019"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63206","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63206","identifiers":["CVE-2026-63206"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-9db698e4659747149ec1092e3d34a5a1","complete":true,"records":13764,"lastAttemptAt":"2026-11-12T09:56:01.66177+00:00","lastSuccessAt":"2026-11-12T09:56:01.656+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:56:01.656+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13817,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-12T09:55:31.2947259+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T09:55:31.2947259+00:00","lastSuccessAt":"2026-11-12T09:55:31.4798179+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:55:31.4798182+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-1a7cc780d036453fb794b7d2d385de9d","complete":false,"records":13764,"lastAttemptAt":"2026-11-12T09:55:57.1306222+00:00","lastSuccessAt":"2026-11-12T09:55:57.111+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:55:57.111+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13313,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-12T09:55:26.640208+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:55:26.640208+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-12T10:53:33.9269183+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-12T10:53:33.9269183+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-f46f74c6a30a9b6e4cfb481719c6d35521ebec2d53ebf163223d093ae587eb9d","complete":true,"records":3106,"lastAttemptAt":"2026-11-12T09:55:31.2553322+00:00","lastSuccessAt":"2026-11-12T09:55:31.1176285+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:55:31.2553322+00:00","snapshotPublishedAt":"2026-11-12T09:48:13+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-ef2ecb421099c77d2be989a707f600817e68bbc84b134f8c0b574289c6a9dbb4","complete":true,"records":231700,"lastAttemptAt":"2026-11-12T10:53:40.0952115+00:00","lastSuccessAt":"2026-11-12T09:55:25.0439596+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:55:26.5140063+00:00","snapshotPublishedAt":"2026-11-12T09:33:09+00:00","importing":true,"stagedRecords":95500,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}