diff --git a/crates/optimism/payload/src/payload.rs b/crates/optimism/payload/src/payload.rs
index ef692ade1b76..a7ead167d768 100644
--- a/crates/optimism/payload/src/payload.rs
+++ b/crates/optimism/payload/src/payload.rs
@@ -53,12 +53,17 @@ impl PayloadBuilderAttributes for OptimismPayloadBuilderAttributes {
             .unwrap_or_default()
             .into_iter()
             .map(|data| {
-                TransactionSigned::decode_2718(&mut data.as_ref())
-                    .map_err(|err| match err {
-                        Eip2718Error::RlpError(err) => err,
-                        _ => alloy_rlp::Error::Custom("invalid transaction"),
-                    })
-                    .map(|tx| WithEncoded::new(data, tx))
+                let mut buf = data.as_ref();
+                let tx = TransactionSigned::decode_2718(&mut buf).map_err(|err| match err {
+                    Eip2718Error::RlpError(err) => err,
+                    _ => alloy_rlp::Error::Custom("invalid transaction"),
+                })?;
+
+                if !buf.is_empty() {
+                    return Err(alloy_rlp::Error::UnexpectedLength);
+                }
+
+                Ok(WithEncoded::new(data, tx))
             })
             .collect::<Result<_, _>>()?;
 
diff --git a/crates/primitives/src/transaction/mod.rs b/crates/primitives/src/transaction/mod.rs
index fffba9f658de..3b49fe8258ae 100644
--- a/crates/primitives/src/transaction/mod.rs
+++ b/crates/primitives/src/transaction/mod.rs
@@ -1982,30 +1982,4 @@ mod tests {
 
         assert!(res.is_err());
     }
-
-    #[test]
-    fn decode_envelope_fails_on_trailing_bytes_legacy() {
-        let data = [201, 3, 56, 56, 128, 43, 36, 27, 128, 3, 192];
-
-        let result = TransactionSigned::decode_2718(&mut data.as_ref());
-
-        assert!(result.is_err());
-        let Err(Eip2718Error::RlpError(err)) = result else {
-            panic!("Expected RlpError, got {:?}", result);
-        };
-        assert_eq!(err, RlpError::UnexpectedLength);
-    }
-
-    #[test]
-    fn decode_envelope_fails_on_trailing_bytes_eip2718() {
-        let data = hex!("02f872018307910d808507204d2cb1827d0094388c818ca8b9251b393131c08a736a67ccb19297880320d04823e2701c80c001a0cf024f4815304df2867a1a74e9d2707b6abda0337d2d54a4438d453f4160f190a07ac0e6b3bc9395b5b9c8b9e6d77204a236577a5b18467b9175c01de4faa208d900");
-
-        let result = TransactionSigned::decode_2718(&mut data.as_ref());
-
-        assert!(result.is_err());
-        let Err(Eip2718Error::RlpError(err)) = result else {
-            panic!("Expected RlpError, got {:?}", result);
-        };
-        assert_eq!(err, RlpError::UnexpectedLength);
-    }
 }
diff --git a/crates/rpc/rpc-types-compat/src/engine/payload.rs b/crates/rpc/rpc-types-compat/src/engine/payload.rs
index 758523630ea3..734cfe46a5fd 100644
--- a/crates/rpc/rpc-types-compat/src/engine/payload.rs
+++ b/crates/rpc/rpc-types-compat/src/engine/payload.rs
@@ -28,10 +28,18 @@ pub fn try_payload_v1_to_block(payload: ExecutionPayloadV1) -> Result<Block, Pay
         .transactions
         .iter()
         .map(|tx| {
-            TransactionSigned::decode_2718(&mut tx.as_ref()).map_err(|err| match err {
+            let mut buf = tx.as_ref();
+
+            let tx = TransactionSigned::decode_2718(&mut buf).map_err(|err| match err {
                 Eip2718Error::RlpError(err) => err,
                 _ => alloy_rlp::Error::Custom("invalid transaction"),
-            })
+            })?;
+
+            if !buf.is_empty() {
+                return Err(alloy_rlp::Error::UnexpectedLength);
+            }
+
+            Ok(tx)
         })
         .collect::<Result<Vec<_>, _>>()?;
     let transactions_root = proofs::calculate_transaction_root(&transactions);