{"id":"CVE-2026-53962","aliases":["BIT-discourse-2026-53962","EUVD-2026-42734","GHSA-jmcf-3367-78vv"],"status":"published","title":"Discourse: Insufficient SVG sanitization logic","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00415,"percentile":0.3628,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-07-09T22:02:27Z","modified":"2026-10-28T02:30:33Z","fixes":[{"ecosystem":"Bitnami","package":"discourse","fixed_in":["2026.1.5","2026.4.2","2026.5.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"discourse","ranges":[{"type":"SEMVER","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"}]}]}],"products":[{"vendor":"discourse","product":"discourse"}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-jmcf-3367-78vv","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://github.com/discourse/discourse/commit/3ee8343cd7f00d59d8513bee0a12e02d50bfc358","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/discourse/discourse/commit/810c2715799fd08b06fd6ffc664d9562fe9ea6ff","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/discourse/discourse/commit/92a699d89b84685b6fdd63cd0d0e371793c69dad","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/discourse/discourse/commit/b8ceb49f4ba52257be30eb3c2ce51a5bf03be5fe","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53962","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53962.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-53962","title":"Discourse: Insufficient SVG sanitization logic","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T22:02:27.43Z","modified":"2026-07-10T20:31:50.782Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:00.11477Z"}],"euvd":[{"id":"EUVD-2026-42734","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T22:02:27Z","modified":"2026-07-10T20:31:50Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:02.308684Z"}],"nvd":[{"id":"CVE-2026-53962","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T22:17:05.6Z","modified":"2026-07-14T01:35:33.597Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:28.4135Z"}],"osv":[{"id":"CVE-2026-53962","title":"Discourse: Insufficient SVG sanitization logic","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T22:02:27.43Z","modified":"2026-10-28T02:30:33.763609822Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:08.132336Z"},{"id":"BIT-discourse-2026-53962","title":"Discourse: Insufficient SVG sanitization logic","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-15T15:56:22.564Z","modified":"2026-09-08T08:46:27.004135288Z","updated_at":"2026-11-02T15:28:29.152062Z"}]}}