{"id":"CVE-2026-73038","summary":"NodeBB \u003c 4.15.0 Stored XSS via ActivityPub emoji tag.icon.url and tag.name","details":"NodeBB before 4.15.0 contains a stored cross-site scripting vulnerability in the renderEmoji function that fails to escape tag.icon.url and tag.name attributes. Attackers can deliver malicious ActivityPub Create/Note objects with crafted emoji tags to inject arbitrary HTML and JavaScript into stored post content, executing code in all viewers' browsers.","modified":"2026-08-16T03:48:57.562922478Z","published":"2026-08-13T18:41:49.275Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73038.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73038.json"},{"type":"ADVISORY","url":"https://github.com/NodeBB/NodeBB/releases/tag/v4.15.0"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73038"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/nodebb-stored-xss-via-activitypub-emoji-tag-icon-url-and-tag-name"},{"type":"REPORT","url":"https://github.com/NodeBB/NodeBB/issues/14601"},{"type":"FIX","url":"https://github.com/NodeBB/NodeBB/commit/c0d94a217edcafcdb9b3920a6e80935194bcb19e"},{"type":"PACKAGE","url":"https://github.com/NodeBB/NodeBB"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nodebb/nodebb","events":[{"introduced":"0"},{"fixed":"fbdbb00d01e01a92baf64534a05fd13685cf3d88"},{"fixed":"c0d94a217edcafcdb9b3920a6e80935194bcb19e"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"4.15.0"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v4.14.0","v4.13.0","v4.12.0","v4.11.0","v4.6.0","v4.0.0-rc.4","v4.0.0-rc.3","v4.0.0-rc.1","v4.0.0-beta.4","v4.0.0-beta.3","v4.0.0-alpha","v3.5.0","v3.3.0","v3.0.0-rc.2","v3.0.0-rc.1","v2.4.0","v2.3.1","v2.3.0","v2.2.5","v2.2.4","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.1","v2.1.0","v2.0.1","v1.19.7","v1.19.6","v1.19.4","v1.17.0-beta.5","v1.17.0-beta.4","v1.17.0-beta.3","v1.17.0-beta.2","v1.17.0-beta.0","v1.16.1-beta.0","v1.15.3-beta.0","v1.15.2-beta.1","v1.15.2-beta.0","v1.15.1","v1.15.1-beta.0","v1.15.0","v1.15.0-rc.5","v1.15.0-rc.4","v1.15.0-rc.3","v1.15.0-rc.1","v1.15.0-rc.0","v1.15.0-beta.30","v1.15.0-beta.29","v1.15.0-beta.27","v1.15.0-beta.25","v1.15.0-beta.24","v1.15.0-beta.23","v1.15.0-beta.22","v1.15.0-beta.21","v1.15.0-beta.19","v1.15.0-beta.18","v1.15.0-beta.17","v1.15.0-beta.16","v1.15.0-beta.15","v1.15.0-beta.14","v1.15.0-beta.13","v1.15.0-beta.12","v1.15.0-beta.11","v1.15.0-beta.10","v1.15.0-beta.9","v1.15.0-beta.8","v1.15.0-beta.7","v1.15.0-beta.6","v1.15.0-beta.5","v1.15.0-beta.4","v1.15.0-beta.3","v1.15.0-beta.2","v1.15.0-beta.1","v1.15.0-beta.0","v1.14.3-beta.16","v1.14.3-beta.15","v1.14.3-beta.14","v1.14.3-beta.13","v1.14.3-beta.12","v1.14.3-beta.11","v1.14.3-beta.10","v1.14.3-beta.9","v1.14.3-beta.8","v1.14.3-beta.7","v1.14.3-beta.6","v1.14.3-beta.5","v1.14.3-beta.4","v1.14.3-beta.0","v1.14.2-beta.1","v1.14.1-beta.3","v1.14.1-beta.1","v1.14.1-beta.0","v1.5.3","v0.9.2","v0.5.0-2","v0.5.0-1","v0.3.2","v0.3.1","v0.3.0","v0.2.0","v0.0.6","v0.0.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73038.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"}]}