{"id":"CVE-2026-59830","summary":"Discourse: Stored XSS via unescaped actor name in post actions","details":"Discourse is an open-source discussion platform. Prior to 2026.7.0, the post action component failed to escape user-controlled display names before interpolating them into an HTML string passed to trustHTML. A user who could choose a crafted display name could persist markup in post action descriptions. Viewing the affected user activity streams could execute attacker-controlled script in another user's browser. This issue is fixed in version 2026.7.0.","aliases":["GHSA-x6mf-p7cg-69rw"],"modified":"2026-09-24T03:30:24.881591251Z","published":"2026-09-21T21:17:38.733Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59830.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"references":[{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.7.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59830.json"},{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-x6mf-p7cg-69rw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59830"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/dd786594ddd088657a7e6f9fefba5bd889965fe4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/discourse/discourse","events":[{"introduced":"0"},{"fixed":"dd786594ddd088657a7e6f9fefba5bd889965fe4"},{"fixed":"ded677e00beb0e9bae6e70b69582aecfb72b5477"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2026.7.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["_gh-attach-assets","v2026.7.0-latest","v2026.6.0-latest","v2026.5.0-latest.1","v2026.5.0-latest","v2026.4.0-latest","v2026.3.0-latest.1","v2026.3.0-latest","v2026.2.0-latest","v2026.1.0-latest","v2025.12.0-latest","v3.6.0.beta2","v3.6.0.beta1","v3.5.0.beta9","v3.5.0.beta8","v3.5.0.beta7","v3.5.0.beta6","v3.5.0.beta5","v3.5.0.beta4","v3.5.0.beta3","v3.5.0.beta2","v3.5.0.beta1","v3.4.0.beta4","v3.4.0.beta3","v3.4.0.beta2","v3.4.0.beta1","v3.3.0.beta5","v3.3.0.beta6","v3.3.0.beta4","v3.3.0.beta3","v3.3.0.beta2","v3.3.0.beta1","v3.2.0.beta5","v3.2.0.beta4","v3.2.0.beta3","v3.2.0.beta2","v3.2.0.beta1","v3.1.0.beta8","v3.1.0.beta7","v3.1.0.beta6","v3.1.0.beta5","v3.1.0.beta4","v3.1.0.beta3","v3.1.0.beta2","v3.1.0.beta1","v3.0.0.beta16","v3.0.0.beta15","v2.9.0.beta14","v2.9.0.beta13","v2.9.0.beta12","v2.9.0.beta11","v2.9.0.beta10","v2.9.0.beta9","v2.9.0.beta8","v2.9.0.beta7","v2.9.0.beta6","v2.9.0.beta5","v2.9.0.beta4","v2.9.0.beta3","v2.9.0.beta2","v2.9.0.beta1","v2.8.0.beta11","v2.8.0.beta10","v2.8.0.beta9","v2.8.0.beta8","v2.8.0.beta7","v2.8.0.beta6","v2.8.0.beta5","v2.8.0.beta4","v2.8.0.beta3","v2.8.0.beta2","v2.8.0.beta1","v2.7.0.beta9","v2.7.0.beta8","v2.7.0.beta7","v2.7.0.beta6","v2.7.0.beta5","v2.7.0.beta4","v2.7.0.beta3","v2.7.0.beta2","v2.7.0.beta1","v2.6.0.beta6","v2.6.0.beta5","v2.6.0.beta4","v2.6.0.beta3","v2.6.0.beta2","v2.6.0.beta1","v2.5.0.beta7","v2.5.0.beta6","v2.5.0.beta5","v2.5.0.beta4","v2.5.0.beta3","v2.5.0.beta2","v2.5.0.beta1","v2.4.0.beta11","v2.4.0.beta10","v2.4.0.beta9","v2.4.0.beta8","v2.4.0.beta7","v2.4.0.beta6","v2.4.0.beta5","v2.4.0.beta4","v2.4.0.beta3","v2.4.0.beta2","v2.4.0.beta1","v2.3.0.beta11","v2.3.0.beta10","v2.3.0.beta9","v2.3.0.beta8","v2.3.0.beta7","v2.3.0.beta6","v2.3.0.beta5","v2.3.0.beta4","v2.3.0.beta3","v2.3.0.beta2","v2.3.0.beta1","v2.2.0.beta10","v2.2.0.beta9","v2.2.0.beta8","v2.2.0.beta7","v2.2.0.beta6","v2.2.0.beta5","v2.2.0.beta4","v2.2.0.beta3","v2.2.0.beta2","v2.2.0.beta1","v2.1.0.beta6","v2.1.0.beta5","v2.1.0.beta4","v2.1.0.beta3","v2.1.0.beta2","v2.1.0.beta1","v2.0.0.beta10","v2.0.0.beta9","v2.0.0.beta8","v2.0.0.beta7","v2.0.0.beta6","v2.0.0.beta5","v2.0.0.beta4","v2.0.0.beta3","v2.0.0.beta2","v2.0.0.beta1","v1.9.0.beta17","v1.9.0.beta16","v1.9.0.beta15","v1.9.0.beta14","v1.9.0.beta13","v1.9.0.beta12","v1.9.0.beta11","v1.9.0.beta10","v1.9.0.beta9","v1.9.0.beta8","v1.9.0.beta7","v1.9.0.beta6","v1.9.0.beta5","v1.9.0.beta4","v1.9.0.beta3","v1.9.0.beta2","v1.9.0.beta1","v1.8.0.beta13","v1.8.0.beta12","v1.8.0.beta11","v1.8.0.beta10","v1.8.0.beta9","v1.8.0.beta8","v1.8.0.beta7","v1.8.0.beta6","v1.8.0.beta5","v1.8.0.beta4","v1.8.0.beta3","v1.8.0.beta2","v1.8.0.beta1","v1.7.0.beta11","v1.7.0.beta10","v1.7.0.beta9","v1.7.0.beta8","v1.7.0.beta7","v1.7.0.beta6","v1.7.0.beta5","v1.7.0.beta4","v1.7.0.beta3","v1.7.0.beta1","v1.7.0.beta2","v1.6.0.beta12","v1.6.0.beta11","v1.6.0.beta10","v1.6.0.beta9","v1.6.0.beta8","v1.6.0.beta7","v1.6.0.beta6","v1.6.0.beta5","v1.6.0.beta4","v1.6.0.beta3","v1.6.0.beta2","v1.6.0.beta1","v1.5.0.beta14","v1.5.0.beta13b","v1.5.0.beta13","v1.5.0.beta12","v1.5.0.beta11","v1.5.0.beta10","v1.5.0.beta9","v1.5.0.beta8","v1.5.0.beta7","v1.5.0.beta6","v1.5.0.beta5","v1.5.0.beta4","v1.5.0.beta2","v1.5.0.beta1","v1.4.0.beta12","v1.4.0.beta11","v1.4.0.beta10","v1.4.0.beta9","v1.4.0.beta8","v1.4.0.beta7","v1.4.0.beta6","v1.4.0.beta5","v1.4.0.beta4","v1.4.0.beta3","v1.4.0.beta2","v1.4.0.beta1","v1.3.0.beta11","v1.3.0.beta10","v1.3.0.beta9","v1.3.0.beta6","v1.3.0.beta5","v1.3.0.beta4","v1.3.0.beta3","v1.3.0.beta2","v1.3.0.beta1","v1.2.0.beta9","v1.2.0.beta8","v1.2.0.beta7","v1.2.0.beta6","v1.2.0.beta5","v1.2.0.beta4","v1.2.0.beta3","v1.2.0.beta2","v1.2.0.beta1","v1.1.0.beta8","v1.1.0.beta7","v1.1.0.beta6b","v1.1.0.beta6","v1.1.0.beta5","v1.1.0.beta4","v1.1.0.beta3","v1.1.0.beta2","v1.0.0","v0.9.9.18","v0.9.9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