Is CVE-2026-73038 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-73038?

CVE-2026-73038 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-73038

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.