From 737b86075cb1c0d978e0161f9fc4dae762a30fd4 Mon Sep 17 00:00:00 2001
From: Sean Li <22557931+sean0407@users.noreply.github.com>
Date: Mon, 19 Oct 2026 03:40:55 +0800
Subject: [PATCH] fix(jackson): decode short strings as UTF-8

---
 .../msgpack/jackson/dataformat/MessagePackParser.java  |  2 +-
 .../dataformat/MessagePackDataformatForPojoTest.java   | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/msgpack-jackson/src/main/java/org/msgpack/jackson/dataformat/MessagePackParser.java b/msgpack-jackson/src/main/java/org/msgpack/jackson/dataformat/MessagePackParser.java
index 72aeed20..6d7b7c8e 100644
--- a/msgpack-jackson/src/main/java/org/msgpack/jackson/dataformat/MessagePackParser.java
+++ b/msgpack-jackson/src/main/java/org/msgpack/jackson/dataformat/MessagePackParser.java
@@ -174,7 +174,7 @@ private String unpackString(MessageUnpacker messageUnpacker) throws IOException
                 return new String(tempChars, 0, strLen);
             }
             else {
-                return new String(tempBytes, 0, strLen);
+                return new String(tempBytes, 0, strLen, StandardCharsets.UTF_8);
             }
         }
         else {
diff --git a/msgpack-jackson/src/test/java/org/msgpack/jackson/dataformat/MessagePackDataformatForPojoTest.java b/msgpack-jackson/src/test/java/org/msgpack/jackson/dataformat/MessagePackDataformatForPojoTest.java
index e899e4f4..96e98d04 100644
--- a/msgpack-jackson/src/test/java/org/msgpack/jackson/dataformat/MessagePackDataformatForPojoTest.java
+++ b/msgpack-jackson/src/test/java/org/msgpack/jackson/dataformat/MessagePackDataformatForPojoTest.java
@@ -94,6 +94,16 @@ public void testStrings()
         assertEquals(stringPojo.longMultiByte, value.longMultiByte);
     }
 
+    @Test
+    public void testUnicodeStringRoundTrip()
+            throws IOException
+    {
+        String original = "çÇğĞıİöÖşŞüÜ";
+        byte[] bytes = objectMapper.writeValueAsBytes(original);
+        String value = objectMapper.readValue(bytes, String.class);
+        assertEquals(original, value);
+    }
+
     @Test
     public void testUsingCustomConstructor()
             throws IOException