From 363cad293eca49f44720f58cd69aeca2f7a55861 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Fri, 27 Feb 2026 14:54:31 -0500
Subject: [PATCH] fix: skip parsing of duplicate emoji tags

---
 src/activitypub/helpers.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/activitypub/helpers.js b/src/activitypub/helpers.js
index 558a4ee8d7..044fc2c82d 100644
--- a/src/activitypub/helpers.js
+++ b/src/activitypub/helpers.js
@@ -559,6 +559,7 @@ Helpers.renderEmoji = (text, tags, strip = false) => {
 	tags = Array.isArray(tags) ? tags : [tags];
 	let result = text;
 
+	const parsed = new Set();
 	tags.forEach((tag) => {
 		const isEmoji = tag.type === 'Emoji';
 		const hasUrl = tag.icon && tag.icon.url;
@@ -566,6 +567,9 @@ Helpers.renderEmoji = (text, tags, strip = false) => {
 
 		if (isEmoji && (strip || (hasUrl && isImage))) {
 			let { name } = tag;
+			if (parsed.has(name)) {
+				return;
+			}
 
 			if (!name.startsWith(':')) {
 				name = `:${name}`;
@@ -583,6 +587,7 @@ Helpers.renderEmoji = (text, tags, strip = false) => {
 				result = result.substring(0, index) + imgTag + result.substring(index + name.length);
 				index = result.indexOf(name, index + imgTag.length);
 			}
+			parsed.add(name);
 		}
 	});