{"id":"CVE-2026-55424","summary":"Discourse: Topic featured link susceptible to stored XSS","details":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic \"featured link\" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","aliases":["BIT-discourse-2026-55424","GHSA-695w-7fv8-mxg3"],"modified":"2026-07-16T03:48:42.418648674Z","published":"2026-07-09T22:01:22.249Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55424.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"references":[{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55424.json"},{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55424"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/discourse/discourse","events":[{"introduced":"322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"},{"fixed":"c06899647d758493d95a5b301e573ffa3db1e878"},{"introduced":"fdd750d960e603415db62242eca3c30d68e366db"},{"fixed":"4bbdddfc6700ca23604242111d4fa0e00347af97"},{"introduced":"640840d818f4ee9375829ece0ef452923bb0c012"},{"fixed":"598586ccf2e046a25d4b54132e4e1feb47f24e98"},{"introduced":"06d03da34c4ed09ea59f917f045ba250d2b6320d"},{"fixed":"1bce8881e4253d9bbab56f011a12ef899b926b59"},{"fixed":"6679d9a5083488bae10c2adbb345c481c583242c"},{"fixed":"6828aee9b15c2655d63b515ac919830bd540ff83"},{"fixed":"c9b9405f5bd0bf0269e505e28e3aad388d7657c5"},{"fixed":"06d03da34c4ed09ea59f917f045ba250d2b6320d"}],"database_specific":{"extracted_events":[{"introduced":"2026.1.0"},{"fixed":"2026.1.5"},{"introduced":"2026.4.0"},{"fixed":"2026.4.2"},{"introduced":"2026.5.0"},{"fixed":"2026.5.1"},{"introduced":"2026.6.0"},{"last_affected":"2026.6.0"}],"source":["CPE_RANGE","CPE_STRING","REFERENCES"],"cpe":["cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","cpe:2.3:a:discourse:discourse:2026.6.0:*:*:*:latest:*:*:*"]}}],"versions":["2026.6.0","v2026.5.0","v2026.6.0-latest","v2026.1.4","v2026.4.1","v2026.5.0-latest.1","v2026.4.0","v2026.5.0-latest","v2026.1.3","v2026.4.0-latest","v2026.1.2","v2026.1.1","v2026.1.0","stable","esr","v2026.1.0-latest"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55424.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}