From aaceb4fd9aae237a27b1b88d8b23432e02dcfa42 Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Tue, 20 Jan 2026 20:59:33 +0000
Subject: Check the length of the username in DefaultIsUser.

---
 src/helperfuncs.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/helperfuncs.cpp')

diff --git a/src/helperfuncs.cpp b/src/helperfuncs.cpp
index 756aeb11b..ac6e9fccc 100644
--- a/src/helperfuncs.cpp
+++ b/src/helperfuncs.cpp
@@ -277,7 +277,7 @@ bool InspIRCd::DefaultIsNick(const std::string_view& n)
 /* return true for good username, false else */
 bool InspIRCd::DefaultIsUser(const std::string_view& n)
 {
-	if (n.empty())
+	if (n.empty() || n.length() > ServerInstance->Config->Limits.MaxUser)
 		return false;
 
 	for (const auto chr : n)
-- 
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