From e49ce3c99c61b08ac11b46b3921e50a050617580 Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Fri, 15 Aug 2025 13:16:13 +0100
Subject: Fix a regression for Docker users who are using their own config.

---
 src/modules/m_spanningtree/server.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/modules/m_spanningtree/server.cpp b/src/modules/m_spanningtree/server.cpp
index 70f50b42e..dc8ebaf79 100644
--- a/src/modules/m_spanningtree/server.cpp
+++ b/src/modules/m_spanningtree/server.cpp
@@ -42,6 +42,10 @@ namespace
 		if (sa.is_local())
 			return true; // Always allowed.
 
+		std::error_code ec;
+		if (Utils->LocalRanges.empty() && std::filesystem::is_regular_file("/.dockerenv", ec))
+			return true; // TODO: remove this a future release.
+
 		for (const auto& cidr : Utils->LocalRanges)
 		{
 			if (cidr.match(sa))
-- 
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