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This issue is fixed in versions @tinacms/mdx 2.1.7 and  tinacms 3.9.3.","state":0,"publishedAt":"2026-07-01T20:44:50.116+00:00","modifiedAt":"2026-07-06T14:39:33.214+00:00","affected":[{"ecosystem":"Vendor product","name":"tinacms","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"tinacms\",\n                    \"product\": \"tinacms\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.9.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"@tinacms/mdx","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"tinacms\",\n                    \"product\": \"@tinacms/mdx\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.1.7\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":4.8,"severity":"MEDIUM"}],"references":["https://github.com/tinacms/tinacms/security/advisories/GHSA-2vcc-5v34-9jc8","https://github.com/tinacms/tinacms/pull/7056"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55661","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-55661","identifiers":["CVE-2026-55661"]},"retained":false,"historicalAffected":[]},{"revision":"fc13b20333f844c7aafe092bc951f5da","observedAt":"2026-11-14T02:09:54.277+00:00","statement":{"source":"euvd","id":"EUVD-2026-41141","aliases":["CVE-2026-55661","GHSA-2vcc-5v34-9jc8"],"title":"Tina is a headless content management system. 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This issue is fixed in versions @tinacms/mdx 2.1.7 and  tinacms 3.9.3.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":4.8,"severity":null}],"references":["https://github.com/tinacms/tinacms/security/advisories/GHSA-2vcc-5v34-9jc8","https://github.com/tinacms/tinacms/pull/7056"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41141","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 1, 2026, 8:44:50 PM","dateUpdated":"Jul 6, 2026, 2:39:33 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. 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Content containing javascript: or data:text/html URLs — including case-variant, whitespace-padded, and control-character-obfuscated forms — is rendered into href/src and executes when the content is viewed. Any actor able to author rich-text content (for example a lower-privileged editor, or imported/external content) can achieve stored XSS against editors and site viewers. 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Any actor able to author rich-text content (for example a lower-privileged editor, or imported/external content) can achieve stored XSS against editors and site viewers.\n\nFixed in https://github.com/tinacms/tinacms/pull/7056 via a `sanitizeUrl()` helper (case-insensitive, whitespace/control-character-normalized scheme allow-list) applied recursively to Slate trees at parse time and in the default rich-text rendering.","state":0,"publishedAt":"2026-06-18T13:07:05+00:00","modifiedAt":"2026-09-10T03:50:55.3654992+00:00","affected":[{"ecosystem":"npm","name":"tinacms","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.9.3"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@tinacms/mdx","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.1.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/tinacms/tinacms/security/advisories/GHSA-2vcc-5v34-9jc8","https://github.com/tinacms/tinacms/pull/7056","https://github.com/tinacms/tinacms"],"sourceUrl":"https://github.com/advisories/GHSA-2vcc-5v34-9jc8","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-2vcc-5v34-9jc8","identifiers":["GHSA-2vcc-5v34-9jc8","CVE-2026-55661"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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