diff --git a/docs/changelog/133193.yaml b/docs/changelog/133193.yaml
new file mode 100644
index 0000000000000..57b286abd9ef5
--- /dev/null
+++ b/docs/changelog/133193.yaml
@@ -0,0 +1,5 @@
+pr: 133193
+summary: Fix offset handling in Murmur3Hasher
+area: Infra/Core
+type: bug
+issues: []
diff --git a/server/src/main/java/org/elasticsearch/common/hash/Murmur3Hasher.java b/server/src/main/java/org/elasticsearch/common/hash/Murmur3Hasher.java
index aec28484138fb..90d40f1ce6d34 100644
--- a/server/src/main/java/org/elasticsearch/common/hash/Murmur3Hasher.java
+++ b/server/src/main/java/org/elasticsearch/common/hash/Murmur3Hasher.java
@@ -75,7 +75,7 @@ public void update(byte[] inputBytes, int offset, int length) {
                 System.arraycopy(inputBytes, offset + numBytesToHash, remainder, 0, remainderLength);
             }
         } else {
-            System.arraycopy(inputBytes, 0, remainder, remainderLength, length);
+            System.arraycopy(inputBytes, offset, remainder, remainderLength, length);
             remainderLength += length;
         }
     }
diff --git a/server/src/test/java/org/elasticsearch/common/hashing/Murmur3HasherTests.java b/server/src/test/java/org/elasticsearch/common/hashing/Murmur3HasherTests.java
index c29dd45d0752e..a426dd876bd5e 100644
--- a/server/src/test/java/org/elasticsearch/common/hashing/Murmur3HasherTests.java
+++ b/server/src/test/java/org/elasticsearch/common/hashing/Murmur3HasherTests.java
@@ -35,8 +35,12 @@ private static void assertHash(long lower, long upper, String inputString, long
         expected.h2 = upper;
 
         byte[] bytes = inputString.getBytes(StandardCharsets.UTF_8);
+        int padding = randomInt(8);
+        int offset = randomInt(padding);
+        byte[] paddedBytes = new byte[bytes.length + padding];
+        System.arraycopy(bytes, 0, paddedBytes, offset, bytes.length);
         Murmur3Hasher mh = new Murmur3Hasher(seed);
-        mh.update(bytes);
+        mh.update(paddedBytes, offset, bytes.length);
         MurmurHash3.Hash128 actual = mh.digestHash();
         assertHash(expected, actual);
     }