Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/NodeBB/NodeBB/commit/c0d94a217edcafcdb9b3920a6e80935194bcb19e
- https://github.com/NodeBB/NodeBB/issues/14601
- https://github.com/NodeBB/NodeBB/releases/tag/v4.15.0
- https://www.vulncheck.com/advisories/nodebb-stored-xss-via-activitypub-emoji-tag
- https://github.com/NodeBB/NodeBB/issues/14601
FAQ
What is CVE-2026-73038?
CVE-2026-73038 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 Activit...
How severe is CVE-2026-73038?
CVE-2026-73038 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73038?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.