diff --git a/core/src/main/java/lucee/runtime/config/s3/BundleProvider.java b/core/src/main/java/lucee/runtime/config/s3/BundleProvider.java
index 17edff1259e..d758a61fc50 100644
--- a/core/src/main/java/lucee/runtime/config/s3/BundleProvider.java
+++ b/core/src/main/java/lucee/runtime/config/s3/BundleProvider.java
@@ -12,7 +12,9 @@
 import java.io.Reader;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.net.URLEncoder;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.security.CodeSource;
 import java.security.GeneralSecurityException;
 import java.util.ArrayList;
@@ -452,16 +454,22 @@ private File deployBundledBundle(File bundleDirectory, String symbolicName, Stri
 	// 1146:size:305198;bundle:name:xmlgraphics.batik.awt.util;version:version EQ 1.8.0;;last-mod:{ts
 	// '2024-01-14 22:32:05'};
 
+	private URL markerURL(String key) throws MalformedURLException {
+		// S3 object keys can contain characters (e.g. spaces) that are illegal in a URI
+		// query and would otherwise abort the entire paginated listing walk.
+		return new URL(this.url.toExternalForm() + "?marker=" + URLEncoder.encode(key, StandardCharsets.UTF_8));
+	}
+
 	public List<Element> read(boolean flush) throws IOException, GeneralSecurityException, SAXException {
 		if (elementsSorted == null) {
 			synchronized (elements) {
 				if (elementsSorted == null) {
 					int count = 100;
 					URL url = null;
-					if (lastKey != null) url = new URL(this.url.toExternalForm() + "?marker=" + lastKey);
+					if (lastKey != null) url = markerURL(lastKey);
 
 					do {
-						if (url == null) url = isTruncated ? new URL(this.url.toExternalForm() + "?marker=" + this.lastKey) : this.url;
+						if (url == null) url = isTruncated ? markerURL(this.lastKey) : this.url;
 						HTTPResponse rsp = HTTPEngine4Impl.get(url, null, null, BundleProvider.CONNECTION_TIMEOUT, true, null, null, null, null);
 						if (rsp != null) {
 							int sc = rsp.getStatusCode();
diff --git a/core/src/main/java/lucee/runtime/osgi/OSGiUtil.java b/core/src/main/java/lucee/runtime/osgi/OSGiUtil.java
index a235ddea8d3..90eb0104f69 100644
--- a/core/src/main/java/lucee/runtime/osgi/OSGiUtil.java
+++ b/core/src/main/java/lucee/runtime/osgi/OSGiUtil.java
@@ -326,8 +326,15 @@ else if (arr.length == 3) {
 			return defaultValue;
 		}
 
-		if (qualifier == null) return new Version(major, minor, micro);
-		return new Version(major, minor, micro, qualifier);
+		try {
+			if (qualifier == null) return new Version(major, minor, micro);
+			return new Version(major, minor, micro, qualifier);
+		}
+		catch (IllegalArgumentException e) {
+			// a malformed qualifier (e.g. a space in an S3 listing entry) makes the OSGi
+			// Version constructor throw; this overload must return defaultValue instead.
+			return defaultValue;
+		}
 	}
 
 	public static Version toVersion(String version) throws BundleException {
diff --git a/test/tickets/LDEV6354.cfc b/test/tickets/LDEV6354.cfc
new file mode 100644
index 00000000000..b47f834a1c7
--- /dev/null
+++ b/test/tickets/LDEV6354.cfc
@@ -0,0 +1,22 @@
+component extends="org.lucee.cfml.test.LuceeTestCase" {
+	public function run( testResults, testBox ) {
+		describe( title="LDEV-6354 OSGiUtil.toVersion tolerates a malformed qualifier instead of throwing", body=function() {
+
+			it( title="returns the default for a qualifier containing a space (the S3 'GA copy' entry)", body=function( currentSpec ) {
+				var OSGiUtil = createObject( "java", "lucee.runtime.osgi.OSGiUtil" );
+				var fallback = createObject( "java", "org.osgi.framework.Version" ).init( "9.9.9" );
+				// must NOT throw IllegalArgumentException; this overload contractually returns the default
+				var result = OSGiUtil.toVersion( "3.9.0.GA copy", fallback );
+				expect( result.toString() ).toBe( "9.9.9" );
+			});
+
+			it( title="still parses a well-formed OSGi version + qualifier", body=function( currentSpec ) {
+				var OSGiUtil = createObject( "java", "lucee.runtime.osgi.OSGiUtil" );
+				var fallback = createObject( "java", "org.osgi.framework.Version" ).init( "9.9.9" );
+				var result = OSGiUtil.toVersion( "3.9.0.GA", fallback );
+				expect( result.toString() ).toBe( "3.9.0.GA" );
+			});
+
+		});
+	}
+}